21391068621

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1559}}^1\times {\mathrm{8581}}^1$

素因数の和:10197

約数の個数: 32

約数和(自身を含む): 31488387840

約数和(自身を除く): 10097319219

約数列:

[1, 3, 13, 39, 41, 123, 533, 1559, 1599, 4677, 8581, 20267, 25743, 60801, 63919, 111553, 191757, 334659, 351821, 830947, 1055463, 2492841, 4573673, 13377779, 13721019, 40133337, 173911127, 521733381, 548488939, 1645466817, 7130356207, 21391068621]

約数ペア:

[(1, 21391068621), (3, 7130356207), (13, 1645466817), (39, 548488939), (41, 521733381), (123, 173911127), (533, 40133337), (1559, 13721019), (1599, 13377779), (4677, 4573673), (8581, 2492841), (20267, 1055463), (25743, 830947), (60801, 351821), (63919, 334659), (111553, 191757)]