21170720

素因数分解:

$2^5\times 5^1\times {\mathrm{307}}^1\times {\mathrm{431}}^1$

素因数の和:753

約数の個数: 48

約数和(自身を含む): 50295168

約数和(自身を除く): 29124448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 307, 431, 614, 862, 1228, 1535, 1724, 2155, 2456, 3070, 3448, 4310, 4912, 6140, 6896, 8620, 9824, 12280, 13792, 17240, 24560, 34480, 49120, 68960, 132317, 264634, 529268, 661585, 1058536, 1323170, 2117072, 2646340, 4234144, 5292680, 10585360, 21170720]

約数ペア:

[(1, 21170720), (2, 10585360), (4, 5292680), (5, 4234144), (8, 2646340), (10, 2117072), (16, 1323170), (20, 1058536), (32, 661585), (40, 529268), (80, 264634), (160, 132317), (307, 68960), (431, 49120), (614, 34480), (862, 24560), (1228, 17240), (1535, 13792), (1724, 12280), (2155, 9824), (2456, 8620), (3070, 6896), (3448, 6140), (4310, 4912)]