21947120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{449}}^1$

素因数の和:522

約数の個数: 80

約数和(自身を含む): 56246400

約数和(自身を除く): 34299280

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 47, 52, 65, 80, 94, 104, 130, 188, 208, 235, 260, 376, 449, 470, 520, 611, 752, 898, 940, 1040, 1222, 1796, 1880, 2245, 2444, 3055, 3592, 3760, 4490, 4888, 5837, 6110, 7184, 8980, 9776, 11674, 12220, 17960, 21103, 23348, 24440, 29185, 35920, 42206, 46696, 48880, 58370, 84412, 93392, 105515, 116740, 168824, 211030, 233480, 274339, 337648, 422060, 466960, 548678, 844120, 1097356, 1371695, 1688240, 2194712, 2743390, 4389424, 5486780, 10973560, 21947120]

約数ペア:

[(1, 21947120), (2, 10973560), (4, 5486780), (5, 4389424), (8, 2743390), (10, 2194712), (13, 1688240), (16, 1371695), (20, 1097356), (26, 844120), (40, 548678), (47, 466960), (52, 422060), (65, 337648), (80, 274339), (94, 233480), (104, 211030), (130, 168824), (188, 116740), (208, 105515), (235, 93392), (260, 84412), (376, 58370), (449, 48880), (470, 46696), (520, 42206), (611, 35920), (752, 29185), (898, 24440), (940, 23348), (1040, 21103), (1222, 17960), (1796, 12220), (1880, 11674), (2245, 9776), (2444, 8980), (3055, 7184), (3592, 6110), (3760, 5837), (4490, 4888)]