21684685

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:285

約数の個数: 32

約数和(自身を含む): 29766528

約数和(自身を除く): 8081843

約数列:

[1, 5, 11, 43, 53, 55, 173, 215, 265, 473, 583, 865, 1903, 2279, 2365, 2915, 7439, 9169, 9515, 11395, 25069, 37195, 45845, 81829, 100859, 125345, 394267, 409145, 504295, 1971335, 4336937, 21684685]

約数ペア:

[(1, 21684685), (5, 4336937), (11, 1971335), (43, 504295), (53, 409145), (55, 394267), (173, 125345), (215, 100859), (265, 81829), (473, 45845), (583, 37195), (865, 25069), (1903, 11395), (2279, 9515), (2365, 9169), (2915, 7439)]