64987760

素因数分解:

$2^4\times 5^1\times {\mathrm{812347}}^1$

素因数の和:812360

約数の個数: 20

約数和(自身を含む): 151096728

約数和(自身を除く): 86108968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 812347, 1624694, 3249388, 4061735, 6498776, 8123470, 12997552, 16246940, 32493880, 64987760]

約数ペア:

[(1, 64987760), (2, 32493880), (4, 16246940), (5, 12997552), (8, 8123470), (10, 6498776), (16, 4061735), (20, 3249388), (40, 1624694), (80, 812347)]