261563380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{13781}}^1$

素因数の和:13876

約数の個数: 48

約数和(自身を含む): 599682384

約数和(自身を除く): 338119004

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 130, 146, 260, 292, 365, 730, 949, 1460, 1898, 3796, 4745, 9490, 13781, 18980, 27562, 55124, 68905, 137810, 179153, 275620, 358306, 716612, 895765, 1006013, 1791530, 2012026, 3583060, 4024052, 5030065, 10060130, 13078169, 20120260, 26156338, 52312676, 65390845, 130781690, 261563380]

約数ペア:

[(1, 261563380), (2, 130781690), (4, 65390845), (5, 52312676), (10, 26156338), (13, 20120260), (20, 13078169), (26, 10060130), (52, 5030065), (65, 4024052), (73, 3583060), (130, 2012026), (146, 1791530), (260, 1006013), (292, 895765), (365, 716612), (730, 358306), (949, 275620), (1460, 179153), (1898, 137810), (3796, 68905), (4745, 55124), (9490, 27562), (13781, 18980)]