21856821

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{54779}}^1$

素因数の和:54808

約数の個数: 16

約数和(自身を含む): 35059200

約数和(自身を除く): 13202379

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 54779, 164337, 383453, 1040801, 1150359, 3122403, 7285607, 21856821]

約数ペア:

[(1, 21856821), (3, 7285607), (7, 3122403), (19, 1150359), (21, 1040801), (57, 383453), (133, 164337), (399, 54779)]