20691858

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{317}}^1$

素因数の和:399

約数の個数: 64

約数和(自身を含む): 48356352

約数和(自身を除く): 27664494

約数列:

[1, 2, 3, 6, 11, 22, 23, 33, 43, 46, 66, 69, 86, 129, 138, 253, 258, 317, 473, 506, 634, 759, 946, 951, 989, 1419, 1518, 1902, 1978, 2838, 2967, 3487, 5934, 6974, 7291, 10461, 10879, 13631, 14582, 20922, 21758, 21873, 27262, 32637, 40893, 43746, 65274, 80201, 81786, 149941, 160402, 240603, 299882, 313513, 449823, 481206, 627026, 899646, 940539, 1881078, 3448643, 6897286, 10345929, 20691858]

約数ペア:

[(1, 20691858), (2, 10345929), (3, 6897286), (6, 3448643), (11, 1881078), (22, 940539), (23, 899646), (33, 627026), (43, 481206), (46, 449823), (66, 313513), (69, 299882), (86, 240603), (129, 160402), (138, 149941), (253, 81786), (258, 80201), (317, 65274), (473, 43746), (506, 40893), (634, 32637), (759, 27262), (946, 21873), (951, 21758), (989, 20922), (1419, 14582), (1518, 13631), (1902, 10879), (1978, 10461), (2838, 7291), (2967, 6974), (3487, 5934)]