20137605

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{503}}^1$

素因数の和:685

約数の個数: 32

約数和(自身を含む): 34401024

約数和(自身を除く): 14263419

約数列:

[1, 3, 5, 15, 17, 51, 85, 157, 255, 471, 503, 785, 1509, 2355, 2515, 2669, 7545, 8007, 8551, 13345, 25653, 40035, 42755, 78971, 128265, 236913, 394855, 1184565, 1342507, 4027521, 6712535, 20137605]

約数ペア:

[(1, 20137605), (3, 6712535), (5, 4027521), (15, 1342507), (17, 1184565), (51, 394855), (85, 236913), (157, 128265), (255, 78971), (471, 42755), (503, 40035), (785, 25653), (1509, 13345), (2355, 8551), (2515, 8007), (2669, 7545)]