21430310

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{199}}^1$

素因数の和:317

約数の個数: 48

約数和(自身を含む): 43092000

約数和(自身を除く): 21661690

約数列:

[1, 2, 5, 10, 11, 22, 55, 89, 110, 121, 178, 199, 242, 398, 445, 605, 890, 979, 995, 1210, 1958, 1990, 2189, 4378, 4895, 9790, 10769, 10945, 17711, 21538, 21890, 24079, 35422, 48158, 53845, 88555, 107690, 120395, 177110, 194821, 240790, 389642, 974105, 1948210, 2143031, 4286062, 10715155, 21430310]

約数ペア:

[(1, 21430310), (2, 10715155), (5, 4286062), (10, 2143031), (11, 1948210), (22, 974105), (55, 389642), (89, 240790), (110, 194821), (121, 177110), (178, 120395), (199, 107690), (242, 88555), (398, 53845), (445, 48158), (605, 35422), (890, 24079), (979, 21890), (995, 21538), (1210, 17711), (1958, 10945), (1990, 10769), (2189, 9790), (4378, 4895)]