18791493

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{241}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 29736960

約数和(自身を除く): 10945467

約数列:

[1, 3, 7, 21, 47, 79, 141, 237, 241, 329, 553, 723, 987, 1659, 1687, 3713, 5061, 11139, 11327, 19039, 25991, 33981, 57117, 77973, 79289, 133273, 237867, 399819, 894833, 2684499, 6263831, 18791493]

約数ペア:

[(1, 18791493), (3, 6263831), (7, 2684499), (21, 894833), (47, 399819), (79, 237867), (141, 133273), (237, 79289), (241, 77973), (329, 57117), (553, 33981), (723, 25991), (987, 19039), (1659, 11327), (1687, 11139), (3713, 5061)]