165320420

素因数分解:

$2^2\times 5^1\times {\mathrm{1277}}^1\times {\mathrm{6473}}^1$

素因数の和:7759

約数の個数: 24

約数和(自身を含む): 347498424

約数和(自身を除く): 182178004

約数列:

[1, 2, 4, 5, 10, 20, 1277, 2554, 5108, 6385, 6473, 12770, 12946, 25540, 25892, 32365, 64730, 129460, 8266021, 16532042, 33064084, 41330105, 82660210, 165320420]

約数ペア:

[(1, 165320420), (2, 82660210), (4, 41330105), (5, 33064084), (10, 16532042), (20, 8266021), (1277, 129460), (2554, 64730), (5108, 32365), (6385, 25892), (6473, 25540), (12770, 12946)]