21481790

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{1091}}^1$

素因数の和:1288

約数の個数: 32

約数和(自身を含む): 42456960

約数和(自身を除く): 20975170

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 179, 358, 895, 1091, 1790, 1969, 2182, 3938, 5455, 9845, 10910, 12001, 19690, 24002, 60005, 120010, 195289, 390578, 976445, 1952890, 2148179, 4296358, 10740895, 21481790]

約数ペア:

[(1, 21481790), (2, 10740895), (5, 4296358), (10, 2148179), (11, 1952890), (22, 976445), (55, 390578), (110, 195289), (179, 120010), (358, 60005), (895, 24002), (1091, 19690), (1790, 12001), (1969, 10910), (2182, 9845), (3938, 5455)]