21270320

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{5657}}^1$

素因数の和:5717

約数の個数: 40

約数和(自身を含む): 50514624

約数和(自身を除く): 29244304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 376, 470, 752, 940, 1880, 3760, 5657, 11314, 22628, 28285, 45256, 56570, 90512, 113140, 226280, 265879, 452560, 531758, 1063516, 1329395, 2127032, 2658790, 4254064, 5317580, 10635160, 21270320]

約数ペア:

[(1, 21270320), (2, 10635160), (4, 5317580), (5, 4254064), (8, 2658790), (10, 2127032), (16, 1329395), (20, 1063516), (40, 531758), (47, 452560), (80, 265879), (94, 226280), (188, 113140), (235, 90512), (376, 56570), (470, 45256), (752, 28285), (940, 22628), (1880, 11314), (3760, 5657)]