19918276

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 42045696

約数和(自身を除く): 22127420

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 92, 157, 161, 197, 314, 322, 394, 628, 644, 788, 1099, 1379, 2198, 2758, 3611, 4396, 4531, 5516, 7222, 9062, 14444, 18124, 25277, 30929, 31717, 50554, 61858, 63434, 101108, 123716, 126868, 216503, 433006, 711367, 866012, 1422734, 2845468, 4979569, 9959138, 19918276]

約数ペア:

[(1, 19918276), (2, 9959138), (4, 4979569), (7, 2845468), (14, 1422734), (23, 866012), (28, 711367), (46, 433006), (92, 216503), (157, 126868), (161, 123716), (197, 101108), (314, 63434), (322, 61858), (394, 50554), (628, 31717), (644, 30929), (788, 25277), (1099, 18124), (1379, 14444), (2198, 9062), (2758, 7222), (3611, 5516), (4396, 4531)]