21957741

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{3541}}^1$

素因数の和:3613

約数の個数: 24

約数和(自身を含む): 34810776

約数和(自身を除く): 12853035

約数列:

[1, 3, 9, 13, 39, 53, 117, 159, 477, 689, 2067, 3541, 6201, 10623, 31869, 46033, 138099, 187673, 414297, 563019, 1689057, 2439749, 7319247, 21957741]

約数ペア:

[(1, 21957741), (3, 7319247), (9, 2439749), (13, 1689057), (39, 563019), (53, 414297), (117, 187673), (159, 138099), (477, 46033), (689, 31869), (2067, 10623), (3541, 6201)]