19680505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{9767}}^1$

素因数の和:9816

約数の個数: 16

約数和(自身を含む): 26256384

約数和(自身を除く): 6575879

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 9767, 48835, 126971, 302777, 634855, 1513885, 3936101, 19680505]

約数ペア:

[(1, 19680505), (5, 3936101), (13, 1513885), (31, 634855), (65, 302777), (155, 126971), (403, 48835), (2015, 9767)]