18837987

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1523}}^1$

素因数の和:1583

約数の個数: 32

約数和(自身を含む): 31211520

約数和(自身を除く): 12373533

約数列:

[1, 3, 7, 19, 21, 31, 57, 93, 133, 217, 399, 589, 651, 1523, 1767, 4123, 4569, 10661, 12369, 28937, 31983, 47213, 86811, 141639, 202559, 330491, 607677, 897047, 991473, 2691141, 6279329, 18837987]

約数ペア:

[(1, 18837987), (3, 6279329), (7, 2691141), (19, 991473), (21, 897047), (31, 607677), (57, 330491), (93, 202559), (133, 141639), (217, 86811), (399, 47213), (589, 31983), (651, 28937), (1523, 12369), (1767, 10661), (4123, 4569)]