18891340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{643}}^1$

素因数の和:778

約数の個数: 48

約数和(自身を含む): 43168608

約数和(自身を除く): 24277268

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 113, 130, 226, 260, 452, 565, 643, 1130, 1286, 1469, 2260, 2572, 2938, 3215, 5876, 6430, 7345, 8359, 12860, 14690, 16718, 29380, 33436, 41795, 72659, 83590, 145318, 167180, 290636, 363295, 726590, 944567, 1453180, 1889134, 3778268, 4722835, 9445670, 18891340]

約数ペア:

[(1, 18891340), (2, 9445670), (4, 4722835), (5, 3778268), (10, 1889134), (13, 1453180), (20, 944567), (26, 726590), (52, 363295), (65, 290636), (113, 167180), (130, 145318), (226, 83590), (260, 72659), (452, 41795), (565, 33436), (643, 29380), (1130, 16718), (1286, 14690), (1469, 12860), (2260, 8359), (2572, 7345), (2938, 6430), (3215, 5876)]