19780164

素因数分解:

$2^2\times 3^2\times {\mathrm{549449}}^1$

素因数の和:549459

約数の個数: 18

約数和(自身を含む): 49999950

約数和(自身を除く): 30219786

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 549449, 1098898, 1648347, 2197796, 3296694, 4945041, 6593388, 9890082, 19780164]

約数ペア:

[(1, 19780164), (2, 9890082), (3, 6593388), (4, 4945041), (6, 3296694), (9, 2197796), (12, 1648347), (18, 1098898), (36, 549449)]