21219691385

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1\times {\mathrm{5113}}^1$

素因数の和:5457

約数の個数: 32

約数和(自身を含む): 26461881600

約数和(自身を除く): 5242190215

約数列:

[1, 5, 43, 97, 199, 215, 485, 995, 4171, 5113, 8557, 19303, 20855, 25565, 42785, 96515, 219859, 495961, 830029, 1017487, 1099295, 2479805, 4150145, 5087435, 21326323, 43751941, 98696239, 106631615, 218759705, 493481195, 4243938277, 21219691385]

約数ペア:

[(1, 21219691385), (5, 4243938277), (43, 493481195), (97, 218759705), (199, 106631615), (215, 98696239), (485, 43751941), (995, 21326323), (4171, 5087435), (5113, 4150145), (8557, 2479805), (19303, 1099295), (20855, 1017487), (25565, 830029), (42785, 495961), (96515, 219859)]