21812008

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{163}}^1\times {\mathrm{389}}^1$

素因数の和:601

約数の個数: 32

約数和(自身を含む): 42213600

約数和(自身を除く): 20401592

約数列:

[1, 2, 4, 8, 43, 86, 163, 172, 326, 344, 389, 652, 778, 1304, 1556, 3112, 7009, 14018, 16727, 28036, 33454, 56072, 63407, 66908, 126814, 133816, 253628, 507256, 2726501, 5453002, 10906004, 21812008]

約数ペア:

[(1, 21812008), (2, 10906004), (4, 5453002), (8, 2726501), (43, 507256), (86, 253628), (163, 133816), (172, 126814), (326, 66908), (344, 63407), (389, 56072), (652, 33454), (778, 28036), (1304, 16727), (1556, 14018), (3112, 7009)]