21239979

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{229}}^1\times {\mathrm{719}}^1$

素因数の和:994

約数の個数: 16

約数和(自身を含む): 29145600

約数和(自身を除く): 7905621

約数列:

[1, 3, 43, 129, 229, 687, 719, 2157, 9847, 29541, 30917, 92751, 164651, 493953, 7079993, 21239979]

約数ペア:

[(1, 21239979), (3, 7079993), (43, 493953), (129, 164651), (229, 92751), (687, 30917), (719, 29541), (2157, 9847)]