77337640

素因数分解:

$2^3\times 5^1\times {\mathrm{991}}^1\times {\mathrm{1951}}^1$

素因数の和:2953

約数の個数: 32

約数和(自身を含む): 174274560

約数和(自身を除く): 96936920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 991, 1951, 1982, 3902, 3964, 4955, 7804, 7928, 9755, 9910, 15608, 19510, 19820, 39020, 39640, 78040, 1933441, 3866882, 7733764, 9667205, 15467528, 19334410, 38668820, 77337640]

約数ペア:

[(1, 77337640), (2, 38668820), (4, 19334410), (5, 15467528), (8, 9667205), (10, 7733764), (20, 3866882), (40, 1933441), (991, 78040), (1951, 39640), (1982, 39020), (3902, 19820), (3964, 19510), (4955, 15608), (7804, 9910), (7928, 9755)]