81741420

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:325

約数の個数: 192

約数和(自身を含む): 277401600

約数和(自身を除く): 195660180

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 27, 30, 31, 36, 38, 45, 54, 57, 60, 62, 76, 90, 93, 95, 108, 114, 124, 135, 155, 171, 180, 186, 190, 228, 257, 270, 279, 285, 310, 342, 372, 380, 465, 513, 514, 540, 558, 570, 589, 620, 684, 771, 837, 855, 930, 1026, 1028, 1116, 1140, 1178, 1285, 1395, 1542, 1674, 1710, 1767, 1860, 2052, 2313, 2356, 2565, 2570, 2790, 2945, 3084, 3348, 3420, 3534, 3855, 4185, 4626, 4883, 5130, 5140, 5301, 5580, 5890, 6939, 7068, 7710, 7967, 8370, 8835, 9252, 9766, 10260, 10602, 11565, 11780, 13878, 14649, 15420, 15903, 15934, 16740, 17670, 19532, 21204, 23130, 23901, 24415, 26505, 27756, 29298, 31806, 31868, 34695, 35340, 39835, 43947, 46260, 47802, 48830, 53010, 58596, 63612, 69390, 71703, 73245, 79515, 79670, 87894, 95604, 97660, 106020, 119505, 131841, 138780, 143406, 146490, 151373, 159030, 159340, 175788, 215109, 219735, 239010, 263682, 286812, 292980, 302746, 318060, 358515, 430218, 439470, 454119, 478020, 527364, 605492, 659205, 717030, 756865, 860436, 878940, 908238, 1075545, 1318410, 1362357, 1434060, 1513730, 1816476, 2151090, 2270595, 2636820, 2724714, 3027460, 4087071, 4302180, 4541190, 5449428, 6811785, 8174142, 9082380, 13623570, 16348284, 20435355, 27247140, 40870710, 81741420]

約数ペア:

[(1, 81741420), (2, 40870710), (3, 27247140), (4, 20435355), (5, 16348284), (6, 13623570), (9, 9082380), (10, 8174142), (12, 6811785), (15, 5449428), (18, 4541190), (19, 4302180), (20, 4087071), (27, 3027460), (30, 2724714), (31, 2636820), (36, 2270595), (38, 2151090), (45, 1816476), (54, 1513730), (57, 1434060), (60, 1362357), (62, 1318410), (76, 1075545), (90, 908238), (93, 878940), (95, 860436), (108, 756865), (114, 717030), (124, 659205), (135, 605492), (155, 527364), (171, 478020), (180, 454119), (186, 439470), (190, 430218), (228, 358515), (257, 318060), (270, 302746), (279, 292980), (285, 286812), (310, 263682), (342, 239010), (372, 219735), (380, 215109), (465, 175788), (513, 159340), (514, 159030), (540, 151373), (558, 146490), (570, 143406), (589, 138780), (620, 131841), (684, 119505), (771, 106020), (837, 97660), (855, 95604), (930, 87894), (1026, 79670), (1028, 79515), (1116, 73245), (1140, 71703), (1178, 69390), (1285, 63612), (1395, 58596), (1542, 53010), (1674, 48830), (1710, 47802), (1767, 46260), (1860, 43947), (2052, 39835), (2313, 35340), (2356, 34695), (2565, 31868), (2570, 31806), (2790, 29298), (2945, 27756), (3084, 26505), (3348, 24415), (3420, 23901), (3534, 23130), (3855, 21204), (4185, 19532), (4626, 17670), (4883, 16740), (5130, 15934), (5140, 15903), (5301, 15420), (5580, 14649), (5890, 13878), (6939, 11780), (7068, 11565), (7710, 10602), (7967, 10260), (8370, 9766), (8835, 9252)]