209481880

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{168937}}^1$

素因数の和:168979

約数の個数: 32

約数和(自身を含む): 486541440

約数和(自身を除く): 277059560

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 168937, 337874, 675748, 844685, 1351496, 1689370, 3378740, 5237047, 6757480, 10474094, 20948188, 26185235, 41896376, 52370470, 104740940, 209481880]

約数ペア:

[(1, 209481880), (2, 104740940), (4, 52370470), (5, 41896376), (8, 26185235), (10, 20948188), (20, 10474094), (31, 6757480), (40, 5237047), (62, 3378740), (124, 1689370), (155, 1351496), (248, 844685), (310, 675748), (620, 337874), (1240, 168937)]