21993712

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{2579}}^1$

素因数の和:2641

約数の個数: 40

約数和(自身を含む): 47028240

約数和(自身を除く): 25034528

約数列:

[1, 2, 4, 8, 13, 16, 26, 41, 52, 82, 104, 164, 208, 328, 533, 656, 1066, 2132, 2579, 4264, 5158, 8528, 10316, 20632, 33527, 41264, 67054, 105739, 134108, 211478, 268216, 422956, 536432, 845912, 1374607, 1691824, 2749214, 5498428, 10996856, 21993712]

約数ペア:

[(1, 21993712), (2, 10996856), (4, 5498428), (8, 2749214), (13, 1691824), (16, 1374607), (26, 845912), (41, 536432), (52, 422956), (82, 268216), (104, 211478), (164, 134108), (208, 105739), (328, 67054), (533, 41264), (656, 33527), (1066, 20632), (2132, 10316), (2579, 8528), (4264, 5158)]