20408355

素因数分解:

$3^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{509}}^1$

素因数の和:543

約数の個数: 56

約数和(自身を含む): 40134960

約数和(自身を除く): 19726605

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 81, 99, 135, 165, 243, 297, 405, 495, 509, 729, 891, 1215, 1485, 1527, 2545, 2673, 3645, 4455, 4581, 5599, 7635, 8019, 13365, 13743, 16797, 22905, 27995, 40095, 41229, 50391, 68715, 83985, 123687, 151173, 206145, 251955, 371061, 453519, 618435, 755865, 1360557, 1855305, 2267595, 4081671, 6802785, 20408355]

約数ペア:

[(1, 20408355), (3, 6802785), (5, 4081671), (9, 2267595), (11, 1855305), (15, 1360557), (27, 755865), (33, 618435), (45, 453519), (55, 371061), (81, 251955), (99, 206145), (135, 151173), (165, 123687), (243, 83985), (297, 68715), (405, 50391), (495, 41229), (509, 40095), (729, 27995), (891, 22905), (1215, 16797), (1485, 13743), (1527, 13365), (2545, 8019), (2673, 7635), (3645, 5599), (4455, 4581)]