19615880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6907}}^1$

素因数の和:6989

約数の個数: 32

約数和(自身を含む): 44763840

約数和(自身を除く): 25147960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 6907, 13814, 27628, 34535, 55256, 69070, 138140, 276280, 490397, 980794, 1961588, 2451985, 3923176, 4903970, 9807940, 19615880]

約数ペア:

[(1, 19615880), (2, 9807940), (4, 4903970), (5, 3923176), (8, 2451985), (10, 1961588), (20, 980794), (40, 490397), (71, 276280), (142, 138140), (284, 69070), (355, 55256), (568, 34535), (710, 27628), (1420, 13814), (2840, 6907)]