64080020

素因数分解:

$2^2\times 5^1\times {\mathrm{1619}}^1\times {\mathrm{1979}}^1$

素因数の和:3607

約数の個数: 24

約数和(自身を含む): 134719200

約数和(自身を除く): 70639180

約数列:

[1, 2, 4, 5, 10, 20, 1619, 1979, 3238, 3958, 6476, 7916, 8095, 9895, 16190, 19790, 32380, 39580, 3204001, 6408002, 12816004, 16020005, 32040010, 64080020]

約数ペア:

[(1, 64080020), (2, 32040010), (4, 16020005), (5, 12816004), (10, 6408002), (20, 3204001), (1619, 39580), (1979, 32380), (3238, 19790), (3958, 16190), (6476, 9895), (7916, 8095)]