21195843

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1\times {\mathrm{521}}^1$

素因数の和:786

約数の個数: 16

約数和(自身を含む): 28864512

約数和(自身を除く): 7668669

約数列:

[1, 3, 71, 191, 213, 521, 573, 1563, 13561, 36991, 40683, 99511, 110973, 298533, 7065281, 21195843]

約数ペア:

[(1, 21195843), (3, 7065281), (71, 298533), (191, 110973), (213, 99511), (521, 40683), (573, 36991), (1563, 13561)]