21131523

素因数分解:

$3^6\times 7^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1$

素因数の和:167

約数の個数: 56

約数和(自身を含む): 37459296

約数和(自身を除く): 16327773

約数列:

[1, 3, 7, 9, 21, 27, 41, 63, 81, 101, 123, 189, 243, 287, 303, 369, 567, 707, 729, 861, 909, 1107, 1701, 2121, 2583, 2727, 3321, 4141, 5103, 6363, 7749, 8181, 9963, 12423, 19089, 23247, 24543, 28987, 29889, 37269, 57267, 69741, 73629, 86961, 111807, 171801, 209223, 260883, 335421, 515403, 782649, 1006263, 2347947, 3018789, 7043841, 21131523]

約数ペア:

[(1, 21131523), (3, 7043841), (7, 3018789), (9, 2347947), (21, 1006263), (27, 782649), (41, 515403), (63, 335421), (81, 260883), (101, 209223), (123, 171801), (189, 111807), (243, 86961), (287, 73629), (303, 69741), (369, 57267), (567, 37269), (707, 29889), (729, 28987), (861, 24543), (909, 23247), (1107, 19089), (1701, 12423), (2121, 9963), (2583, 8181), (2727, 7749), (3321, 6363), (4141, 5103)]