31220021

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1$

素因数の和:225

約数の個数: 32

約数和(自身を含む): 39536640

約数和(自身を除く): 8316619

約数列:

[1, 7, 19, 43, 53, 103, 133, 301, 371, 721, 817, 1007, 1957, 2279, 4429, 5459, 5719, 7049, 13699, 15953, 31003, 38213, 43301, 84151, 103721, 234737, 303107, 589057, 726047, 1643159, 4460003, 31220021]

約数ペア:

[(1, 31220021), (7, 4460003), (19, 1643159), (43, 726047), (53, 589057), (103, 303107), (133, 234737), (301, 103721), (371, 84151), (721, 43301), (817, 38213), (1007, 31003), (1957, 15953), (2279, 13699), (4429, 7049), (5459, 5719)]