21440531

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1$

素因数の和:255

約数の個数: 32

約数和(自身を含む): 27709440

約数和(自身を除く): 6268909

約数列:

[1, 7, 19, 23, 43, 133, 161, 163, 301, 437, 817, 989, 1141, 3059, 3097, 3749, 5719, 6923, 7009, 18791, 21679, 26243, 49063, 71231, 131537, 133171, 161207, 498617, 932197, 1128449, 3062933, 21440531]

約数ペア:

[(1, 21440531), (7, 3062933), (19, 1128449), (23, 932197), (43, 498617), (133, 161207), (161, 133171), (163, 131537), (301, 71231), (437, 49063), (817, 26243), (989, 21679), (1141, 18791), (3059, 7009), (3097, 6923), (3749, 5719)]