21405050

素因数分解:

$2^1\times 5^2\times {\mathrm{79}}^1\times {\mathrm{5419}}^1$

素因数の和:5510

約数の個数: 24

約数和(自身を含む): 40324800

約数和(自身を除く): 18919750

約数列:

[1, 2, 5, 10, 25, 50, 79, 158, 395, 790, 1975, 3950, 5419, 10838, 27095, 54190, 135475, 270950, 428101, 856202, 2140505, 4281010, 10702525, 21405050]

約数ペア:

[(1, 21405050), (2, 10702525), (5, 4281010), (10, 2140505), (25, 856202), (50, 428101), (79, 270950), (158, 135475), (395, 54190), (790, 27095), (1975, 10838), (3950, 5419)]