21651147

素因数分解:

$3^2\times 7^1\times {\mathrm{557}}^1\times {\mathrm{617}}^1$

素因数の和:1187

約数の個数: 24

約数和(自身を含む): 35863776

約数和(自身を除く): 14212629

約数列:

[1, 3, 7, 9, 21, 63, 557, 617, 1671, 1851, 3899, 4319, 5013, 5553, 11697, 12957, 35091, 38871, 343669, 1031007, 2405683, 3093021, 7217049, 21651147]

約数ペア:

[(1, 21651147), (3, 7217049), (7, 3093021), (9, 2405683), (21, 1031007), (63, 343669), (557, 38871), (617, 35091), (1671, 12957), (1851, 11697), (3899, 5553), (4319, 5013)]