21980.000000

素因数分解:

$2^4\times 3^4\times {\mathrm{739}}^1$

素因数の和:759

約数の個数: 50

約数和(自身を含む): 2775740

約数和(自身を除く): 1817996

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 81, 108, 144, 162, 216, 324, 432, 648, 739, 1296, 1478, 2217, 2956, 4434, 5912, 6651, 8868, 11824, 13302, 17736, 19953, 26604, 35472, 39906, 53208, 59859, 79812, 106416, 119718, 159624, 239436, 319248, 478872, 957744]

約数ペア:

[(1, 957744), (2, 478872), (3, 319248), (4, 239436), (6, 159624), (8, 119718), (9, 106416), (12, 79812), (16, 59859), (18, 53208), (24, 39906), (27, 35472), (36, 26604), (48, 19953), (54, 17736), (72, 13302), (81, 11824), (108, 8868), (144, 6651), (162, 5912), (216, 4434), (324, 2956), (432, 2217), (648, 1478), (739, 1296)]