20455100

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:195

約数の個数: 72

約数和(自身を含む): 46747008

約数和(自身を除く): 26291908

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 67, 71, 86, 100, 134, 142, 172, 215, 268, 284, 335, 355, 430, 670, 710, 860, 1075, 1340, 1420, 1675, 1775, 2150, 2881, 3053, 3350, 3550, 4300, 4757, 5762, 6106, 6700, 7100, 9514, 11524, 12212, 14405, 15265, 19028, 23785, 28810, 30530, 47570, 57620, 61060, 72025, 76325, 95140, 118925, 144050, 152650, 204551, 237850, 288100, 305300, 409102, 475700, 818204, 1022755, 2045510, 4091020, 5113775, 10227550, 20455100]

約数ペア:

[(1, 20455100), (2, 10227550), (4, 5113775), (5, 4091020), (10, 2045510), (20, 1022755), (25, 818204), (43, 475700), (50, 409102), (67, 305300), (71, 288100), (86, 237850), (100, 204551), (134, 152650), (142, 144050), (172, 118925), (215, 95140), (268, 76325), (284, 72025), (335, 61060), (355, 57620), (430, 47570), (670, 30530), (710, 28810), (860, 23785), (1075, 19028), (1340, 15265), (1420, 14405), (1675, 12212), (1775, 11524), (2150, 9514), (2881, 7100), (3053, 6700), (3350, 6106), (3550, 5762), (4300, 4757)]