20947568

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{269}}^1$

素因数の和:465

約数の個数: 40

約数和(自身を含む): 42318720

約数和(自身を除く): 21371152

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 157, 248, 269, 314, 496, 538, 628, 1076, 1256, 2152, 2512, 4304, 4867, 8339, 9734, 16678, 19468, 33356, 38936, 42233, 66712, 77872, 84466, 133424, 168932, 337864, 675728, 1309223, 2618446, 5236892, 10473784, 20947568]

約数ペア:

[(1, 20947568), (2, 10473784), (4, 5236892), (8, 2618446), (16, 1309223), (31, 675728), (62, 337864), (124, 168932), (157, 133424), (248, 84466), (269, 77872), (314, 66712), (496, 42233), (538, 38936), (628, 33356), (1076, 19468), (1256, 16678), (2152, 9734), (2512, 8339), (4304, 4867)]