21921284

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{691}}^1$

素因数の和:816

約数の個数: 48

約数和(自身を含む): 48362496

約数和(自身を除く): 26441212

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 103, 154, 206, 308, 412, 691, 721, 1133, 1382, 1442, 2266, 2764, 2884, 4532, 4837, 7601, 7931, 9674, 15202, 15862, 19348, 30404, 31724, 53207, 71173, 106414, 142346, 212828, 284692, 498211, 782903, 996422, 1565806, 1992844, 3131612, 5480321, 10960642, 21921284]

約数ペア:

[(1, 21921284), (2, 10960642), (4, 5480321), (7, 3131612), (11, 1992844), (14, 1565806), (22, 996422), (28, 782903), (44, 498211), (77, 284692), (103, 212828), (154, 142346), (206, 106414), (308, 71173), (412, 53207), (691, 31724), (721, 30404), (1133, 19348), (1382, 15862), (1442, 15202), (2266, 9674), (2764, 7931), (2884, 7601), (4532, 4837)]