20121790

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{4993}}^1$

素因数の和:5044

約数の個数: 32

約数和(自身を含む): 40271616

約数和(自身を除く): 20149826

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 4993, 9986, 24965, 49930, 64909, 129818, 154783, 309566, 324545, 649090, 773915, 1547830, 2012179, 4024358, 10060895, 20121790]

約数ペア:

[(1, 20121790), (2, 10060895), (5, 4024358), (10, 2012179), (13, 1547830), (26, 773915), (31, 649090), (62, 324545), (65, 309566), (130, 154783), (155, 129818), (310, 64909), (403, 49930), (806, 24965), (2015, 9986), (4030, 4993)]