19978299

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{491}}^1$

素因数の和:648

約数の個数: 32

約数和(自身を含む): 32590080

約数和(自身を除く): 12611781

約数列:

[1, 3, 9, 11, 27, 33, 99, 137, 297, 411, 491, 1233, 1473, 1507, 3699, 4419, 4521, 5401, 13257, 13563, 16203, 40689, 48609, 67267, 145827, 201801, 605403, 739937, 1816209, 2219811, 6659433, 19978299]

約数ペア:

[(1, 19978299), (3, 6659433), (9, 2219811), (11, 1816209), (27, 739937), (33, 605403), (99, 201801), (137, 145827), (297, 67267), (411, 48609), (491, 40689), (1233, 16203), (1473, 13563), (1507, 13257), (3699, 5401), (4419, 4521)]