20669560

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{211}}^1$

素因数の和:332

約数の個数: 64

約数和(自身を含む): 48844800

約数和(自身を除く): 28175240

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 79, 124, 155, 158, 211, 248, 310, 316, 395, 422, 620, 632, 790, 844, 1055, 1240, 1580, 1688, 2110, 2449, 3160, 4220, 4898, 6541, 8440, 9796, 12245, 13082, 16669, 19592, 24490, 26164, 32705, 33338, 48980, 52328, 65410, 66676, 83345, 97960, 130820, 133352, 166690, 261640, 333380, 516739, 666760, 1033478, 2066956, 2583695, 4133912, 5167390, 10334780, 20669560]

約数ペア:

[(1, 20669560), (2, 10334780), (4, 5167390), (5, 4133912), (8, 2583695), (10, 2066956), (20, 1033478), (31, 666760), (40, 516739), (62, 333380), (79, 261640), (124, 166690), (155, 133352), (158, 130820), (211, 97960), (248, 83345), (310, 66676), (316, 65410), (395, 52328), (422, 48980), (620, 33338), (632, 32705), (790, 26164), (844, 24490), (1055, 19592), (1240, 16669), (1580, 13082), (1688, 12245), (2110, 9796), (2449, 8440), (3160, 6541), (4220, 4898)]