21976280

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{2089}}^1$

素因数の和:2363

約数の個数: 32

約数和(自身を含む): 49658400

約数和(自身を除く): 27682120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 1052, 1315, 2089, 2104, 2630, 4178, 5260, 8356, 10445, 10520, 16712, 20890, 41780, 83560, 549407, 1098814, 2197628, 2747035, 4395256, 5494070, 10988140, 21976280]

約数ペア:

[(1, 21976280), (2, 10988140), (4, 5494070), (5, 4395256), (8, 2747035), (10, 2197628), (20, 1098814), (40, 549407), (263, 83560), (526, 41780), (1052, 20890), (1315, 16712), (2089, 10520), (2104, 10445), (2630, 8356), (4178, 5260)]