18878913

素因数分解:

$3^6\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1$

素因数の和:113

約数の個数: 56

約数和(自身を含む): 31478400

約数和(自身を除く): 12599487

約数列:

[1, 3, 9, 19, 27, 29, 47, 57, 81, 87, 141, 171, 243, 261, 423, 513, 551, 729, 783, 893, 1269, 1363, 1539, 1653, 2349, 2679, 3807, 4089, 4617, 4959, 7047, 8037, 11421, 12267, 13851, 14877, 21141, 24111, 25897, 34263, 36801, 44631, 72333, 77691, 110403, 133893, 216999, 233073, 331209, 401679, 650997, 699219, 993627, 2097657, 6292971, 18878913]

約数ペア:

[(1, 18878913), (3, 6292971), (9, 2097657), (19, 993627), (27, 699219), (29, 650997), (47, 401679), (57, 331209), (81, 233073), (87, 216999), (141, 133893), (171, 110403), (243, 77691), (261, 72333), (423, 44631), (513, 36801), (551, 34263), (729, 25897), (783, 24111), (893, 21141), (1269, 14877), (1363, 13851), (1539, 12267), (1653, 11421), (2349, 8037), (2679, 7047), (3807, 4959), (4089, 4617)]