20978464

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{239}}^1$

素因数の和:473

約数の個数: 48

約数和(自身を含む): 44876160

約数和(自身を除く): 23897696

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 208, 211, 239, 416, 422, 478, 844, 956, 1688, 1912, 2743, 3107, 3376, 3824, 5486, 6214, 6752, 7648, 10972, 12428, 21944, 24856, 43888, 49712, 50429, 87776, 99424, 100858, 201716, 403432, 655577, 806864, 1311154, 1613728, 2622308, 5244616, 10489232, 20978464]

約数ペア:

[(1, 20978464), (2, 10489232), (4, 5244616), (8, 2622308), (13, 1613728), (16, 1311154), (26, 806864), (32, 655577), (52, 403432), (104, 201716), (208, 100858), (211, 99424), (239, 87776), (416, 50429), (422, 49712), (478, 43888), (844, 24856), (956, 21944), (1688, 12428), (1912, 10972), (2743, 7648), (3107, 6752), (3376, 6214), (3824, 5486)]