639625904

素因数分解:

$2^4\times {\mathrm{197}}^1\times {\mathrm{307}}^1\times {\mathrm{661}}^1$

素因数の和:1173

約数の個数: 40

約数和(自身を含む): 1251513648

約数和(自身を除く): 611887744

約数列:

[1, 2, 4, 8, 16, 197, 307, 394, 614, 661, 788, 1228, 1322, 1576, 2456, 2644, 3152, 4912, 5288, 10576, 60479, 120958, 130217, 202927, 241916, 260434, 405854, 483832, 520868, 811708, 967664, 1041736, 1623416, 2083472, 3246832, 39976619, 79953238, 159906476, 319812952, 639625904]

約数ペア:

[(1, 639625904), (2, 319812952), (4, 159906476), (8, 79953238), (16, 39976619), (197, 3246832), (307, 2083472), (394, 1623416), (614, 1041736), (661, 967664), (788, 811708), (1228, 520868), (1322, 483832), (1576, 405854), (2456, 260434), (2644, 241916), (3152, 202927), (4912, 130217), (5288, 120958), (10576, 60479)]