20997465

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{1229}}^1$

素因数の和:1321

約数の個数: 32

約数和(自身を含む): 36132480

約数和(自身を除く): 15135015

約数列:

[1, 3, 5, 15, 17, 51, 67, 85, 201, 255, 335, 1005, 1139, 1229, 3417, 3687, 5695, 6145, 17085, 18435, 20893, 62679, 82343, 104465, 247029, 313395, 411715, 1235145, 1399831, 4199493, 6999155, 20997465]

約数ペア:

[(1, 20997465), (3, 6999155), (5, 4199493), (15, 1399831), (17, 1235145), (51, 411715), (67, 313395), (85, 247029), (201, 104465), (255, 82343), (335, 62679), (1005, 20893), (1139, 18435), (1229, 17085), (3417, 6145), (3687, 5695)]