21287835

素因数分解:

$3^2\times 5^1\times {\mathrm{367}}^1\times {\mathrm{1289}}^1$

素因数の和:1667

約数の個数: 24

約数和(自身を含む): 37028160

約数和(自身を除く): 15740325

約数列:

[1, 3, 5, 9, 15, 45, 367, 1101, 1289, 1835, 3303, 3867, 5505, 6445, 11601, 16515, 19335, 58005, 473063, 1419189, 2365315, 4257567, 7095945, 21287835]

約数ペア:

[(1, 21287835), (3, 7095945), (5, 4257567), (9, 2365315), (15, 1419189), (45, 473063), (367, 58005), (1101, 19335), (1289, 16515), (1835, 11601), (3303, 6445), (3867, 5505)]