77872780

素因数分解:

$2^2\times 5^1\times {\mathrm{991}}^1\times {\mathrm{3929}}^1$

素因数の和:4929

約数の個数: 24

約数和(自身を含む): 163739520

約数和(自身を除く): 85866740

約数列:

[1, 2, 4, 5, 10, 20, 991, 1982, 3929, 3964, 4955, 7858, 9910, 15716, 19645, 19820, 39290, 78580, 3893639, 7787278, 15574556, 19468195, 38936390, 77872780]

約数ペア:

[(1, 77872780), (2, 38936390), (4, 19468195), (5, 15574556), (10, 7787278), (20, 3893639), (991, 78580), (1982, 39290), (3929, 19820), (3964, 19645), (4955, 15716), (7858, 9910)]