19997428

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{79}}^1\times {\mathrm{523}}^1$

素因数の和:628

約数の個数: 36

約数和(自身を含む): 39027520

約数和(自身を除く): 19030092

約数列:

[1, 2, 4, 11, 22, 44, 79, 121, 158, 242, 316, 484, 523, 869, 1046, 1738, 2092, 3476, 5753, 9559, 11506, 19118, 23012, 38236, 41317, 63283, 82634, 126566, 165268, 253132, 454487, 908974, 1817948, 4999357, 9998714, 19997428]

約数ペア:

[(1, 19997428), (2, 9998714), (4, 4999357), (11, 1817948), (22, 908974), (44, 454487), (79, 253132), (121, 165268), (158, 126566), (242, 82634), (316, 63283), (484, 41317), (523, 38236), (869, 23012), (1046, 19118), (1738, 11506), (2092, 9559), (3476, 5753)]