21581930

素因数分解:

$2^1\times 5^1\times {\mathrm{47}}^2\times {\mathrm{977}}^1$

素因数の和:1078

約数の個数: 24

約数和(自身を含む): 39732228

約数和(自身を除く): 18150298

約数列:

[1, 2, 5, 10, 47, 94, 235, 470, 977, 1954, 2209, 4418, 4885, 9770, 11045, 22090, 45919, 91838, 229595, 459190, 2158193, 4316386, 10790965, 21581930]

約数ペア:

[(1, 21581930), (2, 10790965), (5, 4316386), (10, 2158193), (47, 459190), (94, 229595), (235, 91838), (470, 45919), (977, 22090), (1954, 11045), (2209, 9770), (4418, 4885)]