18993620

素因数分解:

$2^2\times 5^1\times {\mathrm{811}}^1\times {\mathrm{1171}}^1$

素因数の和:1991

約数の個数: 24

約数和(自身を含む): 39969888

約数和(自身を除く): 20976268

約数列:

[1, 2, 4, 5, 10, 20, 811, 1171, 1622, 2342, 3244, 4055, 4684, 5855, 8110, 11710, 16220, 23420, 949681, 1899362, 3798724, 4748405, 9496810, 18993620]

約数ペア:

[(1, 18993620), (2, 9496810), (4, 4748405), (5, 3798724), (10, 1899362), (20, 949681), (811, 23420), (1171, 16220), (1622, 11710), (2342, 8110), (3244, 5855), (4055, 4684)]