19515980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2063}}^1$

素因数の和:2126

約数の個数: 48

約数和(自身を含む): 45771264

約数和(自身を除く): 26255284

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 110, 172, 215, 220, 430, 473, 860, 946, 1892, 2063, 2365, 4126, 4730, 8252, 9460, 10315, 20630, 22693, 41260, 45386, 88709, 90772, 113465, 177418, 226930, 354836, 443545, 453860, 887090, 975799, 1774180, 1951598, 3903196, 4878995, 9757990, 19515980]

約数ペア:

[(1, 19515980), (2, 9757990), (4, 4878995), (5, 3903196), (10, 1951598), (11, 1774180), (20, 975799), (22, 887090), (43, 453860), (44, 443545), (55, 354836), (86, 226930), (110, 177418), (172, 113465), (215, 90772), (220, 88709), (430, 45386), (473, 41260), (860, 22693), (946, 20630), (1892, 10315), (2063, 9460), (2365, 8252), (4126, 4730)]