19487980

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{8623}}^1$

素因数の和:8745

約数の個数: 24

約数和(自身を含む): 41291712

約数和(自身を除く): 21803732

約数列:

[1, 2, 4, 5, 10, 20, 113, 226, 452, 565, 1130, 2260, 8623, 17246, 34492, 43115, 86230, 172460, 974399, 1948798, 3897596, 4871995, 9743990, 19487980]

約数ペア:

[(1, 19487980), (2, 9743990), (4, 4871995), (5, 3897596), (10, 1948798), (20, 974399), (113, 172460), (226, 86230), (452, 43115), (565, 34492), (1130, 17246), (2260, 8623)]