21859960

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:137

約数の個数: 96

約数和(自身を含む): 54817920

約数和(自身を除く): 32957960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 31, 34, 40, 61, 62, 68, 85, 122, 124, 136, 155, 170, 244, 248, 289, 305, 310, 340, 488, 527, 578, 610, 620, 680, 1037, 1054, 1156, 1220, 1240, 1445, 1891, 2074, 2108, 2312, 2440, 2635, 2890, 3782, 4148, 4216, 5185, 5270, 5780, 7564, 8296, 8959, 9455, 10370, 10540, 11560, 15128, 17629, 17918, 18910, 20740, 21080, 32147, 35258, 35836, 37820, 41480, 44795, 64294, 70516, 71672, 75640, 88145, 89590, 128588, 141032, 160735, 176290, 179180, 257176, 321470, 352580, 358360, 546499, 642940, 705160, 1092998, 1285880, 2185996, 2732495, 4371992, 5464990, 10929980, 21859960]

約数ペア:

[(1, 21859960), (2, 10929980), (4, 5464990), (5, 4371992), (8, 2732495), (10, 2185996), (17, 1285880), (20, 1092998), (31, 705160), (34, 642940), (40, 546499), (61, 358360), (62, 352580), (68, 321470), (85, 257176), (122, 179180), (124, 176290), (136, 160735), (155, 141032), (170, 128588), (244, 89590), (248, 88145), (289, 75640), (305, 71672), (310, 70516), (340, 64294), (488, 44795), (527, 41480), (578, 37820), (610, 35836), (620, 35258), (680, 32147), (1037, 21080), (1054, 20740), (1156, 18910), (1220, 17918), (1240, 17629), (1445, 15128), (1891, 11560), (2074, 10540), (2108, 10370), (2312, 9455), (2440, 8959), (2635, 8296), (2890, 7564), (3782, 5780), (4148, 5270), (4216, 5185)]