81544900

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{19889}}^1$

素因数の和:19944

約数の個数: 36

約数和(自身を含む): 181277460

約数和(自身を除く): 99732560

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 19889, 39778, 79556, 99445, 198890, 397780, 497225, 815449, 994450, 1630898, 1988900, 3261796, 4077245, 8154490, 16308980, 20386225, 40772450, 81544900]

約数ペア:

[(1, 81544900), (2, 40772450), (4, 20386225), (5, 16308980), (10, 8154490), (20, 4077245), (25, 3261796), (41, 1988900), (50, 1630898), (82, 994450), (100, 815449), (164, 497225), (205, 397780), (410, 198890), (820, 99445), (1025, 79556), (2050, 39778), (4100, 19889)]