20902821

素因数分解:

$3^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1\times {\mathrm{659}}^1$

素因数の和:868

約数の個数: 16

約数和(自身を含む): 28459200

約数和(自身を除く): 7556379

約数列:

[1, 3, 97, 109, 291, 327, 659, 1977, 10573, 31719, 63923, 71831, 191769, 215493, 6967607, 20902821]

約数ペア:

[(1, 20902821), (3, 6967607), (97, 215493), (109, 191769), (291, 71831), (327, 63923), (659, 31719), (1977, 10573)]