19992890

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{971}}^1$

素因数の和:1078

約数の個数: 32

約数和(自身を含む): 37791360

約数和(自身を除く): 17798470

約数列:

[1, 2, 5, 10, 29, 58, 71, 142, 145, 290, 355, 710, 971, 1942, 2059, 4118, 4855, 9710, 10295, 20590, 28159, 56318, 68941, 137882, 140795, 281590, 344705, 689410, 1999289, 3998578, 9996445, 19992890]

約数ペア:

[(1, 19992890), (2, 9996445), (5, 3998578), (10, 1999289), (29, 689410), (58, 344705), (71, 281590), (142, 140795), (145, 137882), (290, 68941), (355, 56318), (710, 28159), (971, 20590), (1942, 10295), (2059, 9710), (4118, 4855)]