21100905

素因数分解:

$3^6\times 5^1\times 7^1\times {\mathrm{827}}^1$

素因数の和:857

約数の個数: 56

約数和(自身を含む): 43440192

約数和(自身を除く): 22339287

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 243, 315, 405, 567, 729, 827, 945, 1215, 1701, 2481, 2835, 3645, 4135, 5103, 5789, 7443, 8505, 12405, 17367, 22329, 25515, 28945, 37215, 52101, 66987, 86835, 111645, 156303, 200961, 260505, 334935, 468909, 602883, 781515, 1004805, 1406727, 2344545, 3014415, 4220181, 7033635, 21100905]

約数ペア:

[(1, 21100905), (3, 7033635), (5, 4220181), (7, 3014415), (9, 2344545), (15, 1406727), (21, 1004805), (27, 781515), (35, 602883), (45, 468909), (63, 334935), (81, 260505), (105, 200961), (135, 156303), (189, 111645), (243, 86835), (315, 66987), (405, 52101), (567, 37215), (729, 28945), (827, 25515), (945, 22329), (1215, 17367), (1701, 12405), (2481, 8505), (2835, 7443), (3645, 5789), (4135, 5103)]