20819990

素因数分解:

$2^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{163}}^1\times {\mathrm{241}}^1$

素因数の和:464

約数の個数: 32

約数和(自身を含む): 38576736

約数和(自身を除く): 17756746

約数列:

[1, 2, 5, 10, 53, 106, 163, 241, 265, 326, 482, 530, 815, 1205, 1630, 2410, 8639, 12773, 17278, 25546, 39283, 43195, 63865, 78566, 86390, 127730, 196415, 392830, 2081999, 4163998, 10409995, 20819990]

約数ペア:

[(1, 20819990), (2, 10409995), (5, 4163998), (10, 2081999), (53, 392830), (106, 196415), (163, 127730), (241, 86390), (265, 78566), (326, 63865), (482, 43195), (530, 39283), (815, 25546), (1205, 17278), (1630, 12773), (2410, 8639)]