21214930

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{197}}^1$

素因数の和:315

約数の個数: 48

約数和(自身を含む): 42661080

約数和(自身を除く): 21446150

約数列:

[1, 2, 5, 10, 11, 22, 55, 89, 110, 121, 178, 197, 242, 394, 445, 605, 890, 979, 985, 1210, 1958, 1970, 2167, 4334, 4895, 9790, 10769, 10835, 17533, 21538, 21670, 23837, 35066, 47674, 53845, 87665, 107690, 119185, 175330, 192863, 238370, 385726, 964315, 1928630, 2121493, 4242986, 10607465, 21214930]

約数ペア:

[(1, 21214930), (2, 10607465), (5, 4242986), (10, 2121493), (11, 1928630), (22, 964315), (55, 385726), (89, 238370), (110, 192863), (121, 175330), (178, 119185), (197, 107690), (242, 87665), (394, 53845), (445, 47674), (605, 35066), (890, 23837), (979, 21670), (985, 21538), (1210, 17533), (1958, 10835), (1970, 10769), (2167, 9790), (4334, 4895)]