21425355

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{4001}}^1$

素因数の和:4036

約数の個数: 48

約数和(自身を含む): 44950464

約数和(自身を除く): 23525109

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 255, 315, 357, 595, 765, 1071, 1785, 4001, 5355, 12003, 20005, 28007, 36009, 60015, 68017, 84021, 140035, 180045, 204051, 252063, 340085, 420105, 476119, 612153, 1020255, 1260315, 1428357, 2380595, 3060765, 4285071, 7141785, 21425355]

約数ペア:

[(1, 21425355), (3, 7141785), (5, 4285071), (7, 3060765), (9, 2380595), (15, 1428357), (17, 1260315), (21, 1020255), (35, 612153), (45, 476119), (51, 420105), (63, 340085), (85, 252063), (105, 204051), (119, 180045), (153, 140035), (255, 84021), (315, 68017), (357, 60015), (595, 36009), (765, 28007), (1071, 20005), (1785, 12003), (4001, 5355)]