20401275

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{16001}}^1$

素因数の和:16031

約数の個数: 24

約数和(自身を含む): 35716464

約数和(自身を除く): 15315189

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 16001, 48003, 80005, 240015, 272017, 400025, 816051, 1200075, 1360085, 4080255, 6800425, 20401275]

約数ペア:

[(1, 20401275), (3, 6800425), (5, 4080255), (15, 1360085), (17, 1200075), (25, 816051), (51, 400025), (75, 272017), (85, 240015), (255, 80005), (425, 48003), (1275, 16001)]