21871940

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1\times {\mathrm{127}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 47308800

約数和(自身を除く): 25436860

約数列:

[1, 2, 4, 5, 10, 20, 79, 109, 127, 158, 218, 254, 316, 395, 436, 508, 545, 635, 790, 1090, 1270, 1580, 2180, 2540, 8611, 10033, 13843, 17222, 20066, 27686, 34444, 40132, 43055, 50165, 55372, 69215, 86110, 100330, 138430, 172220, 200660, 276860, 1093597, 2187194, 4374388, 5467985, 10935970, 21871940]

約数ペア:

[(1, 21871940), (2, 10935970), (4, 5467985), (5, 4374388), (10, 2187194), (20, 1093597), (79, 276860), (109, 200660), (127, 172220), (158, 138430), (218, 100330), (254, 86110), (316, 69215), (395, 55372), (436, 50165), (508, 43055), (545, 40132), (635, 34444), (790, 27686), (1090, 20066), (1270, 17222), (1580, 13843), (2180, 10033), (2540, 8611)]