19807640

素因数分解:

$2^3\times 5^1\times {\mathrm{307}}^1\times {\mathrm{1613}}^1$

素因数の和:1931

約数の個数: 32

約数和(自身を含む): 44740080

約数和(自身を除く): 24932440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 307, 614, 1228, 1535, 1613, 2456, 3070, 3226, 6140, 6452, 8065, 12280, 12904, 16130, 32260, 64520, 495191, 990382, 1980764, 2475955, 3961528, 4951910, 9903820, 19807640]

約数ペア:

[(1, 19807640), (2, 9903820), (4, 4951910), (5, 3961528), (8, 2475955), (10, 1980764), (20, 990382), (40, 495191), (307, 64520), (614, 32260), (1228, 16130), (1535, 12904), (1613, 12280), (2456, 8065), (3070, 6452), (3226, 6140)]