19707440

素因数分解:

$2^4\times 5^1\times {\mathrm{246343}}^1$

素因数の和:246356

約数の個数: 20

約数和(自身を含む): 45819984

約数和(自身を除く): 26112544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 246343, 492686, 985372, 1231715, 1970744, 2463430, 3941488, 4926860, 9853720, 19707440]

約数ペア:

[(1, 19707440), (2, 9853720), (4, 4926860), (5, 3941488), (8, 2463430), (10, 1970744), (16, 1231715), (20, 985372), (40, 492686), (80, 246343)]