81212560

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{229}}^1$

素因数の和:297

約数の個数: 160

約数和(自身を含む): 229985280

約数和(自身を除く): 148772720

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 31, 40, 44, 52, 55, 62, 65, 80, 88, 104, 110, 124, 130, 143, 155, 176, 208, 220, 229, 248, 260, 286, 310, 341, 403, 440, 458, 496, 520, 572, 620, 682, 715, 806, 880, 916, 1040, 1144, 1145, 1240, 1364, 1430, 1612, 1705, 1832, 2015, 2288, 2290, 2480, 2519, 2728, 2860, 2977, 3224, 3410, 3664, 4030, 4433, 4580, 5038, 5456, 5720, 5954, 6448, 6820, 7099, 8060, 8866, 9160, 10076, 11440, 11908, 12595, 13640, 14198, 14885, 16120, 17732, 18320, 20152, 22165, 23816, 25190, 27280, 28396, 29770, 32240, 32747, 35464, 35495, 40304, 44330, 47632, 50380, 56792, 59540, 65494, 70928, 70990, 78089, 88660, 92287, 100760, 113584, 119080, 130988, 141980, 156178, 163735, 177320, 184574, 201520, 238160, 261976, 283960, 312356, 327470, 354640, 369148, 390445, 461435, 523952, 567920, 624712, 654940, 738296, 780890, 922870, 1015157, 1249424, 1309880, 1476592, 1561780, 1845740, 2030314, 2619760, 3123560, 3691480, 4060628, 5075785, 6247120, 7382960, 8121256, 10151570, 16242512, 20303140, 40606280, 81212560]

約数ペア:

[(1, 81212560), (2, 40606280), (4, 20303140), (5, 16242512), (8, 10151570), (10, 8121256), (11, 7382960), (13, 6247120), (16, 5075785), (20, 4060628), (22, 3691480), (26, 3123560), (31, 2619760), (40, 2030314), (44, 1845740), (52, 1561780), (55, 1476592), (62, 1309880), (65, 1249424), (80, 1015157), (88, 922870), (104, 780890), (110, 738296), (124, 654940), (130, 624712), (143, 567920), (155, 523952), (176, 461435), (208, 390445), (220, 369148), (229, 354640), (248, 327470), (260, 312356), (286, 283960), (310, 261976), (341, 238160), (403, 201520), (440, 184574), (458, 177320), (496, 163735), (520, 156178), (572, 141980), (620, 130988), (682, 119080), (715, 113584), (806, 100760), (880, 92287), (916, 88660), (1040, 78089), (1144, 70990), (1145, 70928), (1240, 65494), (1364, 59540), (1430, 56792), (1612, 50380), (1705, 47632), (1832, 44330), (2015, 40304), (2288, 35495), (2290, 35464), (2480, 32747), (2519, 32240), (2728, 29770), (2860, 28396), (2977, 27280), (3224, 25190), (3410, 23816), (3664, 22165), (4030, 20152), (4433, 18320), (4580, 17732), (5038, 16120), (5456, 14885), (5720, 14198), (5954, 13640), (6448, 12595), (6820, 11908), (7099, 11440), (8060, 10076), (8866, 9160)]