16401980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1483}}^1$

素因数の和:1578

約数の個数: 48

約数和(自身を含む): 39889920

約数和(自身を除く): 23487940

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 79, 140, 158, 316, 395, 553, 790, 1106, 1483, 1580, 2212, 2765, 2966, 5530, 5932, 7415, 10381, 11060, 14830, 20762, 29660, 41524, 51905, 103810, 117157, 207620, 234314, 468628, 585785, 820099, 1171570, 1640198, 2343140, 3280396, 4100495, 8200990, 16401980]

約数ペア:

[(1, 16401980), (2, 8200990), (4, 4100495), (5, 3280396), (7, 2343140), (10, 1640198), (14, 1171570), (20, 820099), (28, 585785), (35, 468628), (70, 234314), (79, 207620), (140, 117157), (158, 103810), (316, 51905), (395, 41524), (553, 29660), (790, 20762), (1106, 14830), (1483, 11060), (1580, 10381), (2212, 7415), (2765, 5932), (2966, 5530)]