20571585

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{131}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 36210240

約数和(自身を除く): 15638655

約数列:

[1, 3, 5, 15, 19, 29, 57, 87, 95, 131, 145, 285, 361, 393, 435, 551, 655, 1083, 1653, 1805, 1965, 2489, 2755, 3799, 5415, 7467, 8265, 10469, 11397, 12445, 18995, 31407, 37335, 47291, 52345, 56985, 72181, 141873, 157035, 216543, 236455, 360905, 709365, 1082715, 1371439, 4114317, 6857195, 20571585]

約数ペア:

[(1, 20571585), (3, 6857195), (5, 4114317), (15, 1371439), (19, 1082715), (29, 709365), (57, 360905), (87, 236455), (95, 216543), (131, 157035), (145, 141873), (285, 72181), (361, 56985), (393, 52345), (435, 47291), (551, 37335), (655, 31407), (1083, 18995), (1653, 12445), (1805, 11397), (1965, 10469), (2489, 8265), (2755, 7467), (3799, 5415)]