21384890

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{1993}}^1$

素因数の和:2066

約数の個数: 32

約数和(自身を含む): 40916880

約数和(自身を除く): 19531990

約数列:

[1, 2, 5, 10, 29, 37, 58, 74, 145, 185, 290, 370, 1073, 1993, 2146, 3986, 5365, 9965, 10730, 19930, 57797, 73741, 115594, 147482, 288985, 368705, 577970, 737410, 2138489, 4276978, 10692445, 21384890]

約数ペア:

[(1, 21384890), (2, 10692445), (5, 4276978), (10, 2138489), (29, 737410), (37, 577970), (58, 368705), (74, 288985), (145, 147482), (185, 115594), (290, 73741), (370, 57797), (1073, 19930), (1993, 10730), (2146, 9965), (3986, 5365)]