661415120

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{32939}}^1$

素因数の和:33203

約数の個数: 40

約数和(自身を含む): 1543963680

約数和(自身を除く): 882548560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 1004, 1255, 2008, 2510, 4016, 5020, 10040, 20080, 32939, 65878, 131756, 164695, 263512, 329390, 527024, 658780, 1317560, 2635120, 8267689, 16535378, 33070756, 41338445, 66141512, 82676890, 132283024, 165353780, 330707560, 661415120]

約数ペア:

[(1, 661415120), (2, 330707560), (4, 165353780), (5, 132283024), (8, 82676890), (10, 66141512), (16, 41338445), (20, 33070756), (40, 16535378), (80, 8267689), (251, 2635120), (502, 1317560), (1004, 658780), (1255, 527024), (2008, 329390), (2510, 263512), (4016, 164695), (5020, 131756), (10040, 65878), (20080, 32939)]