81400960

素因数分解:

$2^7\times 5^1\times {\mathrm{127189}}^1$

素因数の和:127208

約数の個数: 32

約数和(自身を含む): 194600700

約数和(自身を除く): 113199740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127189, 254378, 508756, 635945, 1017512, 1271890, 2035024, 2543780, 4070048, 5087560, 8140096, 10175120, 16280192, 20350240, 40700480, 81400960]

約数ペア:

[(1, 81400960), (2, 40700480), (4, 20350240), (5, 16280192), (8, 10175120), (10, 8140096), (16, 5087560), (20, 4070048), (32, 2543780), (40, 2035024), (64, 1271890), (80, 1017512), (128, 635945), (160, 508756), (320, 254378), (640, 127189)]