20989340

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{443}}^1$

素因数の和:578

約数の個数: 48

約数和(自身を含む): 46545408

約数和(自身を除く): 25556068

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 103, 115, 206, 230, 412, 443, 460, 515, 886, 1030, 1772, 2060, 2215, 2369, 4430, 4738, 8860, 9476, 10189, 11845, 20378, 23690, 40756, 45629, 47380, 50945, 91258, 101890, 182516, 203780, 228145, 456290, 912580, 1049467, 2098934, 4197868, 5247335, 10494670, 20989340]

約数ペア:

[(1, 20989340), (2, 10494670), (4, 5247335), (5, 4197868), (10, 2098934), (20, 1049467), (23, 912580), (46, 456290), (92, 228145), (103, 203780), (115, 182516), (206, 101890), (230, 91258), (412, 50945), (443, 47380), (460, 45629), (515, 40756), (886, 23690), (1030, 20378), (1772, 11845), (2060, 10189), (2215, 9476), (2369, 8860), (4430, 4738)]