20900445

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{2089}}^1$

素因数の和:2149

約数の個数: 32

約数和(自身を含む): 36115200

約数和(自身を除く): 15214755

約数列:

[1, 3, 5, 15, 23, 29, 69, 87, 115, 145, 345, 435, 667, 2001, 2089, 3335, 6267, 10005, 10445, 31335, 48047, 60581, 144141, 181743, 240235, 302905, 720705, 908715, 1393363, 4180089, 6966815, 20900445]

約数ペア:

[(1, 20900445), (3, 6966815), (5, 4180089), (15, 1393363), (23, 908715), (29, 720705), (69, 302905), (87, 240235), (115, 181743), (145, 144141), (345, 60581), (435, 48047), (667, 31335), (2001, 10445), (2089, 10005), (3335, 6267)]