21252855

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1493}}^1$

素因数の和:1587

約数の個数: 32

約数和(自身を含む): 37146816

約数和(自身を除く): 15893961

約数列:

[1, 3, 5, 13, 15, 39, 65, 73, 195, 219, 365, 949, 1095, 1493, 2847, 4479, 4745, 7465, 14235, 19409, 22395, 58227, 97045, 108989, 291135, 326967, 544945, 1416857, 1634835, 4250571, 7084285, 21252855]

約数ペア:

[(1, 21252855), (3, 7084285), (5, 4250571), (13, 1634835), (15, 1416857), (39, 544945), (65, 326967), (73, 291135), (195, 108989), (219, 97045), (365, 58227), (949, 22395), (1095, 19409), (1493, 14235), (2847, 7465), (4479, 4745)]