221520280

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{90787}}^1$

素因数の和:90859

約数の個数: 32

約数和(自身を含む): 506597040

約数和(自身を除く): 285076760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 90787, 181574, 363148, 453935, 726296, 907870, 1815740, 3631480, 5538007, 11076014, 22152028, 27690035, 44304056, 55380070, 110760140, 221520280]

約数ペア:

[(1, 221520280), (2, 110760140), (4, 55380070), (5, 44304056), (8, 27690035), (10, 22152028), (20, 11076014), (40, 5538007), (61, 3631480), (122, 1815740), (244, 907870), (305, 726296), (488, 453935), (610, 363148), (1220, 181574), (2440, 90787)]