87654320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{947}}^1$

素因数の和:1062

約数の個数: 80

約数和(自身を含む): 222173280

約数和(自身を除く): 134518960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 89, 104, 130, 178, 208, 260, 356, 445, 520, 712, 890, 947, 1040, 1157, 1424, 1780, 1894, 2314, 3560, 3788, 4628, 4735, 5785, 7120, 7576, 9256, 9470, 11570, 12311, 15152, 18512, 18940, 23140, 24622, 37880, 46280, 49244, 61555, 75760, 84283, 92560, 98488, 123110, 168566, 196976, 246220, 337132, 421415, 492440, 674264, 842830, 984880, 1095679, 1348528, 1685660, 2191358, 3371320, 4382716, 5478395, 6742640, 8765432, 10956790, 17530864, 21913580, 43827160, 87654320]

約数ペア:

[(1, 87654320), (2, 43827160), (4, 21913580), (5, 17530864), (8, 10956790), (10, 8765432), (13, 6742640), (16, 5478395), (20, 4382716), (26, 3371320), (40, 2191358), (52, 1685660), (65, 1348528), (80, 1095679), (89, 984880), (104, 842830), (130, 674264), (178, 492440), (208, 421415), (260, 337132), (356, 246220), (445, 196976), (520, 168566), (712, 123110), (890, 98488), (947, 92560), (1040, 84283), (1157, 75760), (1424, 61555), (1780, 49244), (1894, 46280), (2314, 37880), (3560, 24622), (3788, 23140), (4628, 18940), (4735, 18512), (5785, 15152), (7120, 12311), (7576, 11570), (9256, 9470)]