20890520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{74609}}^1$

素因数の和:74627

約数の個数: 32

約数和(自身を含む): 53719200

約数和(自身を除く): 32828680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 74609, 149218, 298436, 373045, 522263, 596872, 746090, 1044526, 1492180, 2089052, 2611315, 2984360, 4178104, 5222630, 10445260, 20890520]

約数ペア:

[(1, 20890520), (2, 10445260), (4, 5222630), (5, 4178104), (7, 2984360), (8, 2611315), (10, 2089052), (14, 1492180), (20, 1044526), (28, 746090), (35, 596872), (40, 522263), (56, 373045), (70, 298436), (140, 149218), (280, 74609)]