1980451280

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{348671}}^1$

素因数の和:348755

約数の個数: 40

約数和(自身を含む): 4669415424

約数和(自身を除く): 2688964144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 5680, 348671, 697342, 1394684, 1743355, 2789368, 3486710, 5578736, 6973420, 13946840, 24755641, 27893680, 49511282, 99022564, 123778205, 198045128, 247556410, 396090256, 495112820, 990225640, 1980451280]

約数ペア:

[(1, 1980451280), (2, 990225640), (4, 495112820), (5, 396090256), (8, 247556410), (10, 198045128), (16, 123778205), (20, 99022564), (40, 49511282), (71, 27893680), (80, 24755641), (142, 13946840), (284, 6973420), (355, 5578736), (568, 3486710), (710, 2789368), (1136, 1743355), (1420, 1394684), (2840, 697342), (5680, 348671)]