21015027

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{2687}}^1$

素因数の和:2783

約数の個数: 24

約数和(自身を含む): 33546240

約数和(自身を除く): 12531213

約数列:

[1, 3, 9, 11, 33, 79, 99, 237, 711, 869, 2607, 2687, 7821, 8061, 24183, 29557, 88671, 212273, 266013, 636819, 1910457, 2335003, 7005009, 21015027]

約数ペア:

[(1, 21015027), (3, 7005009), (9, 2335003), (11, 1910457), (33, 636819), (79, 266013), (99, 212273), (237, 88671), (711, 29557), (869, 24183), (2607, 8061), (2687, 7821)]