20604815

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{491}}^1$

素因数の和:623

約数の個数: 32

約数和(自身を含む): 31173120

約数和(自身を除く): 10568305

約数列:

[1, 5, 7, 11, 35, 55, 77, 109, 385, 491, 545, 763, 1199, 2455, 3437, 3815, 5401, 5995, 8393, 17185, 27005, 37807, 41965, 53519, 189035, 267595, 374633, 588709, 1873165, 2943545, 4120963, 20604815]

約数ペア:

[(1, 20604815), (5, 4120963), (7, 2943545), (11, 1873165), (35, 588709), (55, 374633), (77, 267595), (109, 189035), (385, 53519), (491, 41965), (545, 37807), (763, 27005), (1199, 17185), (2455, 8393), (3437, 5995), (3815, 5401)]