21977240

素因数分解:

$2^3\times 5^1\times {\mathrm{549431}}^1$

素因数の和:549442

約数の個数: 16

約数和(自身を含む): 49448880

約数和(自身を除く): 27471640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 549431, 1098862, 2197724, 2747155, 4395448, 5494310, 10988620, 21977240]

約数ペア:

[(1, 21977240), (2, 10988620), (4, 5494310), (5, 4395448), (8, 2747155), (10, 2197724), (20, 1098862), (40, 549431)]