21117993

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{281}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 31836672

約数和(自身を除く): 10718679

約数列:

[1, 3, 13, 39, 41, 47, 123, 141, 281, 533, 611, 843, 1599, 1833, 1927, 3653, 5781, 10959, 11521, 13207, 25051, 34563, 39621, 75153, 149773, 171691, 449319, 515073, 541487, 1624461, 7039331, 21117993]

約数ペア:

[(1, 21117993), (3, 7039331), (13, 1624461), (39, 541487), (41, 515073), (47, 449319), (123, 171691), (141, 149773), (281, 75153), (533, 39621), (611, 34563), (843, 25051), (1599, 13207), (1833, 11521), (1927, 10959), (3653, 5781)]