19684240

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1249}}^1$

素因数の和:1459

約数の個数: 40

約数和(自身を含む): 46035000

約数和(自身を除く): 26350760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1249, 1576, 1970, 2498, 3152, 3940, 4996, 6245, 7880, 9992, 12490, 15760, 19984, 24980, 49960, 99920, 246053, 492106, 984212, 1230265, 1968424, 2460530, 3936848, 4921060, 9842120, 19684240]

約数ペア:

[(1, 19684240), (2, 9842120), (4, 4921060), (5, 3936848), (8, 2460530), (10, 1968424), (16, 1230265), (20, 984212), (40, 492106), (80, 246053), (197, 99920), (394, 49960), (788, 24980), (985, 19984), (1249, 15760), (1576, 12490), (1970, 9992), (2498, 7880), (3152, 6245), (3940, 4996)]