21989571

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:227

約数の個数: 32

約数和(自身を含む): 31825920

約数和(自身を除く): 9836349

約数列:

[1, 3, 31, 41, 73, 79, 93, 123, 219, 237, 1271, 2263, 2449, 2993, 3239, 3813, 5767, 6789, 7347, 8979, 9717, 17301, 92783, 100409, 178777, 236447, 278349, 301227, 536331, 709341, 7329857, 21989571]

約数ペア:

[(1, 21989571), (3, 7329857), (31, 709341), (41, 536331), (73, 301227), (79, 278349), (93, 236447), (123, 178777), (219, 100409), (237, 92783), (1271, 17301), (2263, 9717), (2449, 8979), (2993, 7347), (3239, 6789), (3813, 5767)]