21461515

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1\times {\mathrm{577}}^1$

素因数の和:798

約数の個数: 16

約数和(自身を含む): 26551008

約数和(自身を除く): 5089493

約数列:

[1, 5, 43, 173, 215, 577, 865, 2885, 7439, 24811, 37195, 99821, 124055, 499105, 4292303, 21461515]

約数ペア:

[(1, 21461515), (5, 4292303), (43, 499105), (173, 124055), (215, 99821), (577, 37195), (865, 24811), (2885, 7439)]