18891090

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:145

約数の個数: 128

約数和(自身を含む): 54282240

約数和(自身を除く): 35391150

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 31, 37, 45, 54, 61, 62, 74, 90, 93, 111, 122, 135, 155, 183, 185, 186, 222, 270, 279, 305, 310, 333, 366, 370, 465, 549, 555, 558, 610, 666, 837, 915, 930, 999, 1098, 1110, 1147, 1395, 1647, 1665, 1674, 1830, 1891, 1998, 2257, 2294, 2745, 2790, 3294, 3330, 3441, 3782, 4185, 4514, 4995, 5490, 5673, 5735, 6771, 6882, 8235, 8370, 9455, 9990, 10323, 11285, 11346, 11470, 13542, 16470, 17019, 17205, 18910, 20313, 20646, 22570, 28365, 30969, 33855, 34038, 34410, 40626, 51057, 51615, 56730, 60939, 61938, 67710, 69967, 85095, 101565, 102114, 103230, 121878, 139934, 154845, 170190, 203130, 209901, 255285, 304695, 309690, 349835, 419802, 510570, 609390, 629703, 699670, 1049505, 1259406, 1889109, 2099010, 3148515, 3778218, 6297030, 9445545, 18891090]

約数ペア:

[(1, 18891090), (2, 9445545), (3, 6297030), (5, 3778218), (6, 3148515), (9, 2099010), (10, 1889109), (15, 1259406), (18, 1049505), (27, 699670), (30, 629703), (31, 609390), (37, 510570), (45, 419802), (54, 349835), (61, 309690), (62, 304695), (74, 255285), (90, 209901), (93, 203130), (111, 170190), (122, 154845), (135, 139934), (155, 121878), (183, 103230), (185, 102114), (186, 101565), (222, 85095), (270, 69967), (279, 67710), (305, 61938), (310, 60939), (333, 56730), (366, 51615), (370, 51057), (465, 40626), (549, 34410), (555, 34038), (558, 33855), (610, 30969), (666, 28365), (837, 22570), (915, 20646), (930, 20313), (999, 18910), (1098, 17205), (1110, 17019), (1147, 16470), (1395, 13542), (1647, 11470), (1665, 11346), (1674, 11285), (1830, 10323), (1891, 9990), (1998, 9455), (2257, 8370), (2294, 8235), (2745, 6882), (2790, 6771), (3294, 5735), (3330, 5673), (3441, 5490), (3782, 4995), (4185, 4514)]