21961365

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{1213}}^1$

素因数の和:1309

約数の個数: 32

約数和(自身を含む): 37760256

約数和(自身を除く): 15798891

約数列:

[1, 3, 5, 15, 17, 51, 71, 85, 213, 255, 355, 1065, 1207, 1213, 3621, 3639, 6035, 6065, 18105, 18195, 20621, 61863, 86123, 103105, 258369, 309315, 430615, 1291845, 1464091, 4392273, 7320455, 21961365]

約数ペア:

[(1, 21961365), (3, 7320455), (5, 4392273), (15, 1464091), (17, 1291845), (51, 430615), (71, 309315), (85, 258369), (213, 103105), (255, 86123), (355, 61863), (1065, 20621), (1207, 18195), (1213, 18105), (3621, 6065), (3639, 6035)]