13257820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{251}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 29635200

約数和(自身を除く): 16377380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 139, 190, 251, 278, 380, 502, 556, 695, 1004, 1255, 1390, 2510, 2641, 2780, 4769, 5020, 5282, 9538, 10564, 13205, 19076, 23845, 26410, 34889, 47690, 52820, 69778, 95380, 139556, 174445, 348890, 662891, 697780, 1325782, 2651564, 3314455, 6628910, 13257820]

約数ペア:

[(1, 13257820), (2, 6628910), (4, 3314455), (5, 2651564), (10, 1325782), (19, 697780), (20, 662891), (38, 348890), (76, 174445), (95, 139556), (139, 95380), (190, 69778), (251, 52820), (278, 47690), (380, 34889), (502, 26410), (556, 23845), (695, 19076), (1004, 13205), (1255, 10564), (1390, 9538), (2510, 5282), (2641, 5020), (2780, 4769)]