21720993

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{44971}}^1$

素因数の和:45004

約数の個数: 16

約数和(自身を含む): 34538496

約数和(自身を除く): 12817503

約数列:

[1, 3, 7, 21, 23, 69, 161, 483, 44971, 134913, 314797, 944391, 1034333, 3102999, 7240331, 21720993]

約数ペア:

[(1, 21720993), (3, 7240331), (7, 3102999), (21, 1034333), (23, 944391), (69, 314797), (161, 134913), (483, 44971)]