128287120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{293}}^1\times {\mathrm{421}}^1$

素因数の和:740

約数の個数: 80

約数和(自身を含む): 323073072

約数和(自身を除く): 194785952

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 293, 421, 520, 586, 842, 1040, 1172, 1465, 1684, 2105, 2344, 2930, 3368, 3809, 4210, 4688, 5473, 5860, 6736, 7618, 8420, 10946, 11720, 15236, 16840, 19045, 21892, 23440, 27365, 30472, 33680, 38090, 43784, 54730, 60944, 76180, 87568, 109460, 123353, 152360, 218920, 246706, 304720, 437840, 493412, 616765, 986824, 1233530, 1603589, 1973648, 2467060, 3207178, 4934120, 6414356, 8017945, 9868240, 12828712, 16035890, 25657424, 32071780, 64143560, 128287120]

約数ペア:

[(1, 128287120), (2, 64143560), (4, 32071780), (5, 25657424), (8, 16035890), (10, 12828712), (13, 9868240), (16, 8017945), (20, 6414356), (26, 4934120), (40, 3207178), (52, 2467060), (65, 1973648), (80, 1603589), (104, 1233530), (130, 986824), (208, 616765), (260, 493412), (293, 437840), (421, 304720), (520, 246706), (586, 218920), (842, 152360), (1040, 123353), (1172, 109460), (1465, 87568), (1684, 76180), (2105, 60944), (2344, 54730), (2930, 43784), (3368, 38090), (3809, 33680), (4210, 30472), (4688, 27365), (5473, 23440), (5860, 21892), (6736, 19045), (7618, 16840), (8420, 15236), (10946, 11720)]