77879780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{4481}}^1$

素因数の和:4580

約数の個数: 48

約数和(自身を含む): 180714240

約数和(自身を除く): 102834460

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 79, 110, 158, 220, 316, 395, 790, 869, 1580, 1738, 3476, 4345, 4481, 8690, 8962, 17380, 17924, 22405, 44810, 49291, 89620, 98582, 197164, 246455, 353999, 492910, 707998, 985820, 1415996, 1769995, 3539990, 3893989, 7079980, 7787978, 15575956, 19469945, 38939890, 77879780]

約数ペア:

[(1, 77879780), (2, 38939890), (4, 19469945), (5, 15575956), (10, 7787978), (11, 7079980), (20, 3893989), (22, 3539990), (44, 1769995), (55, 1415996), (79, 985820), (110, 707998), (158, 492910), (220, 353999), (316, 246455), (395, 197164), (790, 98582), (869, 89620), (1580, 49291), (1738, 44810), (3476, 22405), (4345, 17924), (4481, 17380), (8690, 8962)]