646989680

素因数分解:

$2^4\times 5^1\times {\mathrm{8087371}}^1$

素因数の和:8087384

約数の個数: 20

約数和(自身を含む): 1504251192

約数和(自身を除く): 857261512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8087371, 16174742, 32349484, 40436855, 64698968, 80873710, 129397936, 161747420, 323494840, 646989680]

約数ペア:

[(1, 646989680), (2, 323494840), (4, 161747420), (5, 129397936), (8, 80873710), (10, 64698968), (16, 40436855), (20, 32349484), (40, 16174742), (80, 8087371)]