20718165

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{587}}^1$

素因数の和:789

約数の個数: 32

約数和(自身を含む): 35957376

約数和(自身を除く): 15239211

約数列:

[1, 3, 5, 13, 15, 39, 65, 181, 195, 543, 587, 905, 1761, 2353, 2715, 2935, 7059, 7631, 8805, 11765, 22893, 35295, 38155, 106247, 114465, 318741, 531235, 1381211, 1593705, 4143633, 6906055, 20718165]

約数ペア:

[(1, 20718165), (3, 6906055), (5, 4143633), (13, 1593705), (15, 1381211), (39, 531235), (65, 318741), (181, 114465), (195, 106247), (543, 38155), (587, 35295), (905, 22893), (1761, 11765), (2353, 8805), (2715, 7631), (2935, 7059)]