20945320

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{263}}^1$

素因数の和:466

約数の個数: 64

約数和(自身を含む): 51891840

約数和(自身を除く): 30946520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 181, 220, 263, 362, 440, 526, 724, 905, 1052, 1315, 1448, 1810, 1991, 2104, 2630, 2893, 3620, 3982, 5260, 5786, 7240, 7964, 9955, 10520, 11572, 14465, 15928, 19910, 23144, 28930, 39820, 47603, 57860, 79640, 95206, 115720, 190412, 238015, 380824, 476030, 523633, 952060, 1047266, 1904120, 2094532, 2618165, 4189064, 5236330, 10472660, 20945320]

約数ペア:

[(1, 20945320), (2, 10472660), (4, 5236330), (5, 4189064), (8, 2618165), (10, 2094532), (11, 1904120), (20, 1047266), (22, 952060), (40, 523633), (44, 476030), (55, 380824), (88, 238015), (110, 190412), (181, 115720), (220, 95206), (263, 79640), (362, 57860), (440, 47603), (526, 39820), (724, 28930), (905, 23144), (1052, 19910), (1315, 15928), (1448, 14465), (1810, 11572), (1991, 10520), (2104, 9955), (2630, 7964), (2893, 7240), (3620, 5786), (3982, 5260)]