81178720

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{72481}}^1$

素因数の和:72503

約数の個数: 48

約数和(自身を含む): 219185568

約数和(自身を除く): 138006848

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 72481, 144962, 289924, 362405, 507367, 579848, 724810, 1014734, 1159696, 1449620, 2029468, 2319392, 2536835, 2899240, 4058936, 5073670, 5798480, 8117872, 10147340, 11596960, 16235744, 20294680, 40589360, 81178720]

約数ペア:

[(1, 81178720), (2, 40589360), (4, 20294680), (5, 16235744), (7, 11596960), (8, 10147340), (10, 8117872), (14, 5798480), (16, 5073670), (20, 4058936), (28, 2899240), (32, 2536835), (35, 2319392), (40, 2029468), (56, 1449620), (70, 1159696), (80, 1014734), (112, 724810), (140, 579848), (160, 507367), (224, 362405), (280, 289924), (560, 144962), (1120, 72481)]