20290281

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 30750720

約数和(自身を除く): 10460439

約数列:

[1, 3, 11, 33, 43, 79, 129, 181, 237, 473, 543, 869, 1419, 1991, 2607, 3397, 5973, 7783, 10191, 14299, 23349, 37367, 42897, 85613, 112101, 157289, 256839, 471867, 614857, 1844571, 6763427, 20290281]

約数ペア:

[(1, 20290281), (3, 6763427), (11, 1844571), (33, 614857), (43, 471867), (79, 256839), (129, 157289), (181, 112101), (237, 85613), (473, 42897), (543, 37367), (869, 23349), (1419, 14299), (1991, 10191), (2607, 7783), (3397, 5973)]