18947980

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{9767}}^1$

素因数の和:9873

約数の個数: 24

約数和(自身を含む): 40205088

約数和(自身を除く): 21257108

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 9767, 19534, 39068, 48835, 97670, 195340, 947399, 1894798, 3789596, 4736995, 9473990, 18947980]

約数ペア:

[(1, 18947980), (2, 9473990), (4, 4736995), (5, 3789596), (10, 1894798), (20, 947399), (97, 195340), (194, 97670), (388, 48835), (485, 39068), (970, 19534), (1940, 9767)]