20647756

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:302

約数の個数: 36

約数和(自身を含む): 38831520

約数和(自身を除く): 18183764

約数列:

[1, 2, 4, 19, 38, 76, 79, 158, 181, 316, 361, 362, 722, 724, 1444, 1501, 3002, 3439, 6004, 6878, 13756, 14299, 28519, 28598, 57038, 57196, 65341, 114076, 130682, 261364, 271681, 543362, 1086724, 5161939, 10323878, 20647756]

約数ペア:

[(1, 20647756), (2, 10323878), (4, 5161939), (19, 1086724), (38, 543362), (76, 271681), (79, 261364), (158, 130682), (181, 114076), (316, 65341), (361, 57196), (362, 57038), (722, 28598), (724, 28519), (1444, 14299), (1501, 13756), (3002, 6878), (3439, 6004)]