21218240

素因数分解:

$2^6\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1087}}^1$

素因数の和:1165

約数の個数: 56

約数和(自身を含む): 51401472

約数和(自身を除く): 30183232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 160, 244, 305, 320, 488, 610, 976, 1087, 1220, 1952, 2174, 2440, 3904, 4348, 4880, 5435, 8696, 9760, 10870, 17392, 19520, 21740, 34784, 43480, 66307, 69568, 86960, 132614, 173920, 265228, 331535, 347840, 530456, 663070, 1060912, 1326140, 2121824, 2652280, 4243648, 5304560, 10609120, 21218240]

約数ペア:

[(1, 21218240), (2, 10609120), (4, 5304560), (5, 4243648), (8, 2652280), (10, 2121824), (16, 1326140), (20, 1060912), (32, 663070), (40, 530456), (61, 347840), (64, 331535), (80, 265228), (122, 173920), (160, 132614), (244, 86960), (305, 69568), (320, 66307), (488, 43480), (610, 34784), (976, 21740), (1087, 19520), (1220, 17392), (1952, 10870), (2174, 9760), (2440, 8696), (3904, 5435), (4348, 4880)]