21801681

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{349}}^1\times {\mathrm{631}}^1$

素因数の和:997

約数の個数: 24

約数和(自身を含む): 34507200

約数和(自身を除く): 12705519

約数列:

[1, 3, 9, 11, 33, 99, 349, 631, 1047, 1893, 3141, 3839, 5679, 6941, 11517, 20823, 34551, 62469, 220219, 660657, 1981971, 2422409, 7267227, 21801681]

約数ペア:

[(1, 21801681), (3, 7267227), (9, 2422409), (11, 1981971), (33, 660657), (99, 220219), (349, 62469), (631, 34551), (1047, 20823), (1893, 11517), (3141, 6941), (3839, 5679)]