20211371068

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{557}}^1\times {\mathrm{68207}}^1$

素因数の和:68794

約数の個数: 48

約数和(自身を含む): 42627271680

約数和(自身を除く): 22415900612

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 266, 532, 557, 1114, 2228, 3899, 7798, 10583, 15596, 21166, 42332, 68207, 74081, 136414, 148162, 272828, 296324, 477449, 954898, 1295933, 1909796, 2591866, 5183732, 9071531, 18143062, 36286124, 37991299, 75982598, 151965196, 265939093, 531878186, 721834681, 1063756372, 1443669362, 2887338724, 5052842767, 10105685534, 20211371068]

約数ペア:

[(1, 20211371068), (2, 10105685534), (4, 5052842767), (7, 2887338724), (14, 1443669362), (19, 1063756372), (28, 721834681), (38, 531878186), (76, 265939093), (133, 151965196), (266, 75982598), (532, 37991299), (557, 36286124), (1114, 18143062), (2228, 9071531), (3899, 5183732), (7798, 2591866), (10583, 1909796), (15596, 1295933), (21166, 954898), (42332, 477449), (68207, 296324), (74081, 272828), (136414, 148162)]