18887375

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{197}}^1$

素因数の和:284

約数の個数: 32

約数和(自身を含む): 25945920

約数和(自身を除く): 7058545

約数列:

[1, 5, 13, 25, 59, 65, 125, 197, 295, 325, 767, 985, 1475, 1625, 2561, 3835, 4925, 7375, 11623, 12805, 19175, 24625, 58115, 64025, 95875, 151099, 290575, 320125, 755495, 1452875, 3777475, 18887375]

約数ペア:

[(1, 18887375), (5, 3777475), (13, 1452875), (25, 755495), (59, 320125), (65, 290575), (125, 151099), (197, 95875), (295, 64025), (325, 58115), (767, 24625), (985, 19175), (1475, 12805), (1625, 11623), (2561, 7375), (3835, 4925)]