639604880

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{61031}}^1$

素因数の和:61175

約数の個数: 40

約数和(自身を含む): 1498457664

約数和(自身を除く): 858852784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 2096, 2620, 5240, 10480, 61031, 122062, 244124, 305155, 488248, 610310, 976496, 1220620, 2441240, 4882480, 7995061, 15990122, 31980244, 39975305, 63960488, 79950610, 127920976, 159901220, 319802440, 639604880]

約数ペア:

[(1, 639604880), (2, 319802440), (4, 159901220), (5, 127920976), (8, 79950610), (10, 63960488), (16, 39975305), (20, 31980244), (40, 15990122), (80, 7995061), (131, 4882480), (262, 2441240), (524, 1220620), (655, 976496), (1048, 610310), (1310, 488248), (2096, 305155), (2620, 244124), (5240, 122062), (10480, 61031)]