639553280

素因数分解:

$2^8\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8191}}^1$

素因数の和:8273

約数の個数: 72

約数和(自身を含む): 1557233664

約数和(自身を除く): 917680384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 244, 256, 305, 320, 488, 610, 640, 976, 1220, 1280, 1952, 2440, 3904, 4880, 7808, 8191, 9760, 15616, 16382, 19520, 32764, 39040, 40955, 65528, 78080, 81910, 131056, 163820, 262112, 327640, 499651, 524224, 655280, 999302, 1048448, 1310560, 1998604, 2096896, 2498255, 2621120, 3997208, 4996510, 5242240, 7994416, 9993020, 10484480, 15988832, 19986040, 31977664, 39972080, 63955328, 79944160, 127910656, 159888320, 319776640, 639553280]

約数ペア:

[(1, 639553280), (2, 319776640), (4, 159888320), (5, 127910656), (8, 79944160), (10, 63955328), (16, 39972080), (20, 31977664), (32, 19986040), (40, 15988832), (61, 10484480), (64, 9993020), (80, 7994416), (122, 5242240), (128, 4996510), (160, 3997208), (244, 2621120), (256, 2498255), (305, 2096896), (320, 1998604), (488, 1310560), (610, 1048448), (640, 999302), (976, 655280), (1220, 524224), (1280, 499651), (1952, 327640), (2440, 262112), (3904, 163820), (4880, 131056), (7808, 81910), (8191, 78080), (9760, 65528), (15616, 40955), (16382, 39040), (19520, 32764)]