290420920

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{136991}}^1$

素因数の和:137055

約数の個数: 32

約数和(自身を含む): 665781120

約数和(自身を除く): 375360200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 136991, 273982, 547964, 684955, 1095928, 1369910, 2739820, 5479640, 7260523, 14521046, 29042092, 36302615, 58084184, 72605230, 145210460, 290420920]

約数ペア:

[(1, 290420920), (2, 145210460), (4, 72605230), (5, 58084184), (8, 36302615), (10, 29042092), (20, 14521046), (40, 7260523), (53, 5479640), (106, 2739820), (212, 1369910), (265, 1095928), (424, 684955), (530, 547964), (1060, 273982), (2120, 136991)]