405490040

素因数分解:

$2^3\times 5^1\times {\mathrm{2161}}^1\times {\mathrm{4691}}^1$

素因数の和:6863

約数の個数: 32

約数和(自身を含む): 912969360

約数和(自身を除く): 507479320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2161, 4322, 4691, 8644, 9382, 10805, 17288, 18764, 21610, 23455, 37528, 43220, 46910, 86440, 93820, 187640, 10137251, 20274502, 40549004, 50686255, 81098008, 101372510, 202745020, 405490040]

約数ペア:

[(1, 405490040), (2, 202745020), (4, 101372510), (5, 81098008), (8, 50686255), (10, 40549004), (20, 20274502), (40, 10137251), (2161, 187640), (4322, 93820), (4691, 86440), (8644, 46910), (9382, 43220), (10805, 37528), (17288, 23455), (18764, 21610)]