18666860

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10487}}^1$

素因数の和:10585

約数の個数: 24

約数和(自身を含む): 39644640

約数和(自身を除く): 20977780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10487, 20974, 41948, 52435, 104870, 209740, 933343, 1866686, 3733372, 4666715, 9333430, 18666860]

約数ペア:

[(1, 18666860), (2, 9333430), (4, 4666715), (5, 3733372), (10, 1866686), (20, 933343), (89, 209740), (178, 104870), (356, 52435), (445, 41948), (890, 20974), (1780, 10487)]