18945940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72869}}^1$

素因数の和:72891

約数の個数: 24

約数和(自身を含む): 42847560

約数和(自身を除く): 23901620

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72869, 145738, 291476, 364345, 728690, 947297, 1457380, 1894594, 3789188, 4736485, 9472970, 18945940]

約数ペア:

[(1, 18945940), (2, 9472970), (4, 4736485), (5, 3789188), (10, 1894594), (13, 1457380), (20, 947297), (26, 728690), (52, 364345), (65, 291476), (130, 145738), (260, 72869)]