78386840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{3943}}^1$

素因数の和:4032

約数の個数: 64

約数和(自身を含む): 204456960

約数和(自身を除く): 126070120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1420, 1988, 2485, 2840, 3943, 3976, 4970, 7886, 9940, 15772, 19715, 19880, 27601, 31544, 39430, 55202, 78860, 110404, 138005, 157720, 220808, 276010, 279953, 552020, 559906, 1104040, 1119812, 1399765, 1959671, 2239624, 2799530, 3919342, 5599060, 7838684, 9798355, 11198120, 15677368, 19596710, 39193420, 78386840]

約数ペア:

[(1, 78386840), (2, 39193420), (4, 19596710), (5, 15677368), (7, 11198120), (8, 9798355), (10, 7838684), (14, 5599060), (20, 3919342), (28, 2799530), (35, 2239624), (40, 1959671), (56, 1399765), (70, 1119812), (71, 1104040), (140, 559906), (142, 552020), (280, 279953), (284, 276010), (355, 220808), (497, 157720), (568, 138005), (710, 110404), (994, 78860), (1420, 55202), (1988, 39430), (2485, 31544), (2840, 27601), (3943, 19880), (3976, 19715), (4970, 15772), (7886, 9940)]