19912660

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{379}}^1$

素因数の和:496

約数の個数: 48

約数和(自身を含む): 43666560

約数和(自身を除く): 23753900

約数列:

[1, 2, 4, 5, 10, 20, 37, 71, 74, 142, 148, 185, 284, 355, 370, 379, 710, 740, 758, 1420, 1516, 1895, 2627, 3790, 5254, 7580, 10508, 13135, 14023, 26270, 26909, 28046, 52540, 53818, 56092, 70115, 107636, 134545, 140230, 269090, 280460, 538180, 995633, 1991266, 3982532, 4978165, 9956330, 19912660]

約数ペア:

[(1, 19912660), (2, 9956330), (4, 4978165), (5, 3982532), (10, 1991266), (20, 995633), (37, 538180), (71, 280460), (74, 269090), (142, 140230), (148, 134545), (185, 107636), (284, 70115), (355, 56092), (370, 53818), (379, 52540), (710, 28046), (740, 26909), (758, 26270), (1420, 14023), (1516, 13135), (1895, 10508), (2627, 7580), (3790, 5254)]