19778045

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{311}}^1$

素因数の和:425

約数の個数: 32

約数和(自身を含む): 28753920

約数和(自身を除く): 8975875

約数列:

[1, 5, 7, 23, 35, 79, 115, 161, 311, 395, 553, 805, 1555, 1817, 2177, 2765, 7153, 9085, 10885, 12719, 24569, 35765, 50071, 63595, 122845, 171983, 250355, 565087, 859915, 2825435, 3955609, 19778045]

約数ペア:

[(1, 19778045), (5, 3955609), (7, 2825435), (23, 859915), (35, 565087), (79, 250355), (115, 171983), (161, 122845), (311, 63595), (395, 50071), (553, 35765), (805, 24569), (1555, 12719), (1817, 10885), (2177, 9085), (2765, 7153)]