199438760

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{121609}}^1$

素因数の和:121661

約数の個数: 32

約数和(自身を含む): 459685800

約数和(自身を除く): 260247040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 121609, 243218, 486436, 608045, 972872, 1216090, 2432180, 4864360, 4985969, 9971938, 19943876, 24929845, 39887752, 49859690, 99719380, 199438760]

約数ペア:

[(1, 199438760), (2, 99719380), (4, 49859690), (5, 39887752), (8, 24929845), (10, 19943876), (20, 9971938), (40, 4985969), (41, 4864360), (82, 2432180), (164, 1216090), (205, 972872), (328, 608045), (410, 486436), (820, 243218), (1640, 121609)]