21168980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21601}}^1$

素因数の和:21624

約数の個数: 36

約数和(自身を含む): 51715188

約数和(自身を除く): 30546208

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21601, 43202, 86404, 108005, 151207, 216010, 302414, 432020, 604828, 756035, 1058449, 1512070, 2116898, 3024140, 4233796, 5292245, 10584490, 21168980]

約数ペア:

[(1, 21168980), (2, 10584490), (4, 5292245), (5, 4233796), (7, 3024140), (10, 2116898), (14, 1512070), (20, 1058449), (28, 756035), (35, 604828), (49, 432020), (70, 302414), (98, 216010), (140, 151207), (196, 108005), (245, 86404), (490, 43202), (980, 21601)]