205987580

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{439}}^1\times {\mathrm{809}}^1$

素因数の和:1286

約数の個数: 48

約数和(自身を含む): 449064000

約数和(自身を除く): 243076420

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 439, 580, 809, 878, 1618, 1756, 2195, 3236, 4045, 4390, 8090, 8780, 12731, 16180, 23461, 25462, 46922, 50924, 63655, 93844, 117305, 127310, 234610, 254620, 355151, 469220, 710302, 1420604, 1775755, 3551510, 7103020, 10299379, 20598758, 41197516, 51496895, 102993790, 205987580]

約数ペア:

[(1, 205987580), (2, 102993790), (4, 51496895), (5, 41197516), (10, 20598758), (20, 10299379), (29, 7103020), (58, 3551510), (116, 1775755), (145, 1420604), (290, 710302), (439, 469220), (580, 355151), (809, 254620), (878, 234610), (1618, 127310), (1756, 117305), (2195, 93844), (3236, 63655), (4045, 50924), (4390, 46922), (8090, 25462), (8780, 23461), (12731, 16180)]