21272240

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1051}}^1$

素因数の和:1098

約数の個数: 80

約数和(自身を含む): 56353536

約数和(自身を除く): 35081296

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 23, 40, 44, 46, 55, 80, 88, 92, 110, 115, 176, 184, 220, 230, 253, 368, 440, 460, 506, 880, 920, 1012, 1051, 1265, 1840, 2024, 2102, 2530, 4048, 4204, 5060, 5255, 8408, 10120, 10510, 11561, 16816, 20240, 21020, 23122, 24173, 42040, 46244, 48346, 57805, 84080, 92488, 96692, 115610, 120865, 184976, 193384, 231220, 241730, 265903, 386768, 462440, 483460, 531806, 924880, 966920, 1063612, 1329515, 1933840, 2127224, 2659030, 4254448, 5318060, 10636120, 21272240]

約数ペア:

[(1, 21272240), (2, 10636120), (4, 5318060), (5, 4254448), (8, 2659030), (10, 2127224), (11, 1933840), (16, 1329515), (20, 1063612), (22, 966920), (23, 924880), (40, 531806), (44, 483460), (46, 462440), (55, 386768), (80, 265903), (88, 241730), (92, 231220), (110, 193384), (115, 184976), (176, 120865), (184, 115610), (220, 96692), (230, 92488), (253, 84080), (368, 57805), (440, 48346), (460, 46244), (506, 42040), (880, 24173), (920, 23122), (1012, 21020), (1051, 20240), (1265, 16816), (1840, 11561), (2024, 10510), (2102, 10120), (2530, 8408), (4048, 5255), (4204, 5060)]