20458760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2357}}^1$

素因数の和:2406

約数の個数: 64

約数和(自身を含む): 54328320

約数和(自身を除く): 33869560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2357, 4340, 4714, 8680, 9428, 11785, 16499, 18856, 23570, 32998, 47140, 65996, 73067, 82495, 94280, 131992, 146134, 164990, 292268, 329980, 365335, 511469, 584536, 659960, 730670, 1022938, 1461340, 2045876, 2557345, 2922680, 4091752, 5114690, 10229380, 20458760]

約数ペア:

[(1, 20458760), (2, 10229380), (4, 5114690), (5, 4091752), (7, 2922680), (8, 2557345), (10, 2045876), (14, 1461340), (20, 1022938), (28, 730670), (31, 659960), (35, 584536), (40, 511469), (56, 365335), (62, 329980), (70, 292268), (124, 164990), (140, 146134), (155, 131992), (217, 94280), (248, 82495), (280, 73067), (310, 65996), (434, 47140), (620, 32998), (868, 23570), (1085, 18856), (1240, 16499), (1736, 11785), (2170, 9428), (2357, 8680), (4340, 4714)]