19681275

素因数分解:

$3^1\times 5^2\times {\mathrm{397}}^1\times {\mathrm{661}}^1$

素因数の和:1071

約数の個数: 24

約数和(自身を含む): 32671024

約数和(自身を除く): 12989749

約数列:

[1, 3, 5, 15, 25, 75, 397, 661, 1191, 1983, 1985, 3305, 5955, 9915, 9925, 16525, 29775, 49575, 262417, 787251, 1312085, 3936255, 6560425, 19681275]

約数ペア:

[(1, 19681275), (3, 6560425), (5, 3936255), (15, 1312085), (25, 787251), (75, 262417), (397, 49575), (661, 29775), (1191, 16525), (1983, 9925), (1985, 9915), (3305, 5955)]