19388900

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{4729}}^1$

素因数の和:4784

約数の個数: 36

約数和(自身を含む): 43109220

約数和(自身を除く): 23720320

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 4729, 9458, 18916, 23645, 47290, 94580, 118225, 193889, 236450, 387778, 472900, 775556, 969445, 1938890, 3877780, 4847225, 9694450, 19388900]

約数ペア:

[(1, 19388900), (2, 9694450), (4, 4847225), (5, 3877780), (10, 1938890), (20, 969445), (25, 775556), (41, 472900), (50, 387778), (82, 236450), (100, 193889), (164, 118225), (205, 94580), (410, 47290), (820, 23645), (1025, 18916), (2050, 9458), (4100, 4729)]