21705440

素因数分解:

$2^5\times 5^1\times {\mathrm{293}}^1\times {\mathrm{463}}^1$

素因数の和:771

約数の個数: 48

約数和(自身を含む): 51565248

約数和(自身を除く): 29859808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 293, 463, 586, 926, 1172, 1465, 1852, 2315, 2344, 2930, 3704, 4630, 4688, 5860, 7408, 9260, 9376, 11720, 14816, 18520, 23440, 37040, 46880, 74080, 135659, 271318, 542636, 678295, 1085272, 1356590, 2170544, 2713180, 4341088, 5426360, 10852720, 21705440]

約数ペア:

[(1, 21705440), (2, 10852720), (4, 5426360), (5, 4341088), (8, 2713180), (10, 2170544), (16, 1356590), (20, 1085272), (32, 678295), (40, 542636), (80, 271318), (160, 135659), (293, 74080), (463, 46880), (586, 37040), (926, 23440), (1172, 18520), (1465, 14816), (1852, 11720), (2315, 9376), (2344, 9260), (2930, 7408), (3704, 5860), (4630, 4688)]