19881550

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{419}}^1$

素因数の和:517

約数の個数: 48

約数和(自身を含む): 40466160

約数和(自身を除く): 20584610

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 73, 130, 146, 325, 365, 419, 650, 730, 838, 949, 1825, 1898, 2095, 3650, 4190, 4745, 5447, 9490, 10475, 10894, 20950, 23725, 27235, 30587, 47450, 54470, 61174, 136175, 152935, 272350, 305870, 397631, 764675, 795262, 1529350, 1988155, 3976310, 9940775, 19881550]

約数ペア:

[(1, 19881550), (2, 9940775), (5, 3976310), (10, 1988155), (13, 1529350), (25, 795262), (26, 764675), (50, 397631), (65, 305870), (73, 272350), (130, 152935), (146, 136175), (325, 61174), (365, 54470), (419, 47450), (650, 30587), (730, 27235), (838, 23725), (949, 20950), (1825, 10894), (1898, 10475), (2095, 9490), (3650, 5447), (4190, 4745)]