21802775

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{239}}^1$

素因数の和:379

約数の個数: 24

約数和(自身を含む): 28123200

約数和(自身を除く): 6320425

約数列:

[1, 5, 25, 41, 89, 205, 239, 445, 1025, 1195, 2225, 3649, 5975, 9799, 18245, 21271, 48995, 91225, 106355, 244975, 531775, 872111, 4360555, 21802775]

約数ペア:

[(1, 21802775), (5, 4360555), (25, 872111), (41, 531775), (89, 244975), (205, 106355), (239, 91225), (445, 48995), (1025, 21271), (1195, 18245), (2225, 9799), (3649, 5975)]