20521125

素因数分解:

$3^2\times 5^3\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1$

素因数の和:104

約数の個数: 96

約数和(自身を含む): 41614560

約数和(自身を除く): 21093435

約数列:

[1, 3, 5, 9, 15, 17, 25, 29, 37, 45, 51, 75, 85, 87, 111, 125, 145, 153, 185, 225, 255, 261, 333, 375, 425, 435, 493, 555, 629, 725, 765, 925, 1073, 1125, 1275, 1305, 1479, 1665, 1887, 2125, 2175, 2465, 2775, 3145, 3219, 3625, 3825, 4437, 4625, 5365, 5661, 6375, 6525, 7395, 8325, 9435, 9657, 10875, 12325, 13875, 15725, 16095, 18241, 19125, 22185, 26825, 28305, 32625, 36975, 41625, 47175, 48285, 54723, 61625, 78625, 80475, 91205, 110925, 134125, 141525, 164169, 184875, 235875, 241425, 273615, 402375, 456025, 554625, 707625, 820845, 1207125, 1368075, 2280125, 4104225, 6840375, 20521125]

約数ペア:

[(1, 20521125), (3, 6840375), (5, 4104225), (9, 2280125), (15, 1368075), (17, 1207125), (25, 820845), (29, 707625), (37, 554625), (45, 456025), (51, 402375), (75, 273615), (85, 241425), (87, 235875), (111, 184875), (125, 164169), (145, 141525), (153, 134125), (185, 110925), (225, 91205), (255, 80475), (261, 78625), (333, 61625), (375, 54723), (425, 48285), (435, 47175), (493, 41625), (555, 36975), (629, 32625), (725, 28305), (765, 26825), (925, 22185), (1073, 19125), (1125, 18241), (1275, 16095), (1305, 15725), (1479, 13875), (1665, 12325), (1887, 10875), (2125, 9657), (2175, 9435), (2465, 8325), (2775, 7395), (3145, 6525), (3219, 6375), (3625, 5661), (3825, 5365), (4437, 4625)]