20508356

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{47}}^2\times {\mathrm{211}}^1$

素因数の和:320

約数の個数: 36

約数和(自身を含む): 40192656

約数和(自身を除く): 19684300

約数列:

[1, 2, 4, 11, 22, 44, 47, 94, 188, 211, 422, 517, 844, 1034, 2068, 2209, 2321, 4418, 4642, 8836, 9284, 9917, 19834, 24299, 39668, 48598, 97196, 109087, 218174, 436348, 466099, 932198, 1864396, 5127089, 10254178, 20508356]

約数ペア:

[(1, 20508356), (2, 10254178), (4, 5127089), (11, 1864396), (22, 932198), (44, 466099), (47, 436348), (94, 218174), (188, 109087), (211, 97196), (422, 48598), (517, 39668), (844, 24299), (1034, 19834), (2068, 9917), (2209, 9284), (2321, 8836), (4418, 4642)]