21151455

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3499}}^1$

素因数の和:3551

約数の個数: 32

約数和(自身を含む): 37632000

約数和(自身を除く): 16480545

約数列:

[1, 3, 5, 13, 15, 31, 39, 65, 93, 155, 195, 403, 465, 1209, 2015, 3499, 6045, 10497, 17495, 45487, 52485, 108469, 136461, 227435, 325407, 542345, 682305, 1410097, 1627035, 4230291, 7050485, 21151455]

約数ペア:

[(1, 21151455), (3, 7050485), (5, 4230291), (13, 1627035), (15, 1410097), (31, 682305), (39, 542345), (65, 325407), (93, 227435), (155, 136461), (195, 108469), (403, 52485), (465, 45487), (1209, 17495), (2015, 10497), (3499, 6045)]