19628375

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{257}}^1$

素因数の和:332

約数の個数: 32

約数和(自身を含む): 27046656

約数和(自身を除く): 7418281

約数列:

[1, 5, 13, 25, 47, 65, 125, 235, 257, 325, 611, 1175, 1285, 1625, 3055, 3341, 5875, 6425, 12079, 15275, 16705, 32125, 60395, 76375, 83525, 157027, 301975, 417625, 785135, 1509875, 3925675, 19628375]

約数ペア:

[(1, 19628375), (5, 3925675), (13, 1509875), (25, 785135), (47, 417625), (65, 301975), (125, 157027), (235, 83525), (257, 76375), (325, 60395), (611, 32125), (1175, 16705), (1285, 15275), (1625, 12079), (3055, 6425), (3341, 5875)]