20749905

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:271

約数の個数: 64

約数和(自身を含む): 40953600

約数和(自身を除く): 20203695

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 89, 99, 135, 157, 165, 267, 297, 445, 471, 495, 785, 801, 979, 1335, 1413, 1485, 1727, 2355, 2403, 2937, 4005, 4239, 4895, 5181, 7065, 8635, 8811, 12015, 13973, 14685, 15543, 21195, 25905, 26433, 41919, 44055, 46629, 69865, 77715, 125757, 132165, 153703, 209595, 233145, 377271, 461109, 628785, 768515, 1383327, 1886355, 2305545, 4149981, 6916635, 20749905]

約数ペア:

[(1, 20749905), (3, 6916635), (5, 4149981), (9, 2305545), (11, 1886355), (15, 1383327), (27, 768515), (33, 628785), (45, 461109), (55, 377271), (89, 233145), (99, 209595), (135, 153703), (157, 132165), (165, 125757), (267, 77715), (297, 69865), (445, 46629), (471, 44055), (495, 41919), (785, 26433), (801, 25905), (979, 21195), (1335, 15543), (1413, 14685), (1485, 13973), (1727, 12015), (2355, 8811), (2403, 8635), (2937, 7065), (4005, 5181), (4239, 4895)]