20215400

素因数分解:

$2^3\times 5^2\times {\mathrm{61}}^1\times {\mathrm{1657}}^1$

素因数の和:1734

約数の個数: 48

約数和(自身を含む): 47800140

約数和(自身を除く): 27584740

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 61, 100, 122, 200, 244, 305, 488, 610, 1220, 1525, 1657, 2440, 3050, 3314, 6100, 6628, 8285, 12200, 13256, 16570, 33140, 41425, 66280, 82850, 101077, 165700, 202154, 331400, 404308, 505385, 808616, 1010770, 2021540, 2526925, 4043080, 5053850, 10107700, 20215400]

約数ペア:

[(1, 20215400), (2, 10107700), (4, 5053850), (5, 4043080), (8, 2526925), (10, 2021540), (20, 1010770), (25, 808616), (40, 505385), (50, 404308), (61, 331400), (100, 202154), (122, 165700), (200, 101077), (244, 82850), (305, 66280), (488, 41425), (610, 33140), (1220, 16570), (1525, 13256), (1657, 12200), (2440, 8285), (3050, 6628), (3314, 6100)]