21701505

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{71}}^2$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 41231232

約数和(自身を除く): 19529727

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 71, 105, 123, 205, 213, 287, 355, 497, 615, 861, 1065, 1435, 1491, 2485, 2911, 4305, 5041, 7455, 8733, 14555, 15123, 20377, 25205, 35287, 43665, 61131, 75615, 101885, 105861, 176435, 206681, 305655, 529305, 620043, 1033405, 1446767, 3100215, 4340301, 7233835, 21701505]

約数ペア:

[(1, 21701505), (3, 7233835), (5, 4340301), (7, 3100215), (15, 1446767), (21, 1033405), (35, 620043), (41, 529305), (71, 305655), (105, 206681), (123, 176435), (205, 105861), (213, 101885), (287, 75615), (355, 61131), (497, 43665), (615, 35287), (861, 25205), (1065, 20377), (1435, 15123), (1491, 14555), (2485, 8733), (2911, 7455), (4305, 5041)]