21198832

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{509}}^1$

素因数の和:673

約数の個数: 40

約数和(自身を含む): 43635600

約数和(自身を除く): 22436768

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 137, 152, 274, 304, 509, 548, 1018, 1096, 2036, 2192, 2603, 4072, 5206, 8144, 9671, 10412, 19342, 20824, 38684, 41648, 69733, 77368, 139466, 154736, 278932, 557864, 1115728, 1324927, 2649854, 5299708, 10599416, 21198832]

約数ペア:

[(1, 21198832), (2, 10599416), (4, 5299708), (8, 2649854), (16, 1324927), (19, 1115728), (38, 557864), (76, 278932), (137, 154736), (152, 139466), (274, 77368), (304, 69733), (509, 41648), (548, 38684), (1018, 20824), (1096, 19342), (2036, 10412), (2192, 9671), (2603, 8144), (4072, 5206)]