20101840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{431}}^1$

素因数の和:508

約数の個数: 80

約数和(自身を含む): 52068096

約数和(自身を除く): 31966256

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 53, 55, 80, 88, 106, 110, 176, 212, 220, 265, 424, 431, 440, 530, 583, 848, 862, 880, 1060, 1166, 1724, 2120, 2155, 2332, 2915, 3448, 4240, 4310, 4664, 4741, 5830, 6896, 8620, 9328, 9482, 11660, 17240, 18964, 22843, 23320, 23705, 34480, 37928, 45686, 46640, 47410, 75856, 91372, 94820, 114215, 182744, 189640, 228430, 251273, 365488, 379280, 456860, 502546, 913720, 1005092, 1256365, 1827440, 2010184, 2512730, 4020368, 5025460, 10050920, 20101840]

約数ペア:

[(1, 20101840), (2, 10050920), (4, 5025460), (5, 4020368), (8, 2512730), (10, 2010184), (11, 1827440), (16, 1256365), (20, 1005092), (22, 913720), (40, 502546), (44, 456860), (53, 379280), (55, 365488), (80, 251273), (88, 228430), (106, 189640), (110, 182744), (176, 114215), (212, 94820), (220, 91372), (265, 75856), (424, 47410), (431, 46640), (440, 45686), (530, 37928), (583, 34480), (848, 23705), (862, 23320), (880, 22843), (1060, 18964), (1166, 17240), (1724, 11660), (2120, 9482), (2155, 9328), (2332, 8620), (2915, 6896), (3448, 5830), (4240, 4741), (4310, 4664)]