15661960

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{1259}}^1$

素因数の和:1581

約数の個数: 32

約数和(自身を含む): 35380800

約数和(自身を除く): 19718840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1259, 1555, 2488, 2518, 3110, 5036, 6220, 6295, 10072, 12440, 12590, 25180, 50360, 391549, 783098, 1566196, 1957745, 3132392, 3915490, 7830980, 15661960]

約数ペア:

[(1, 15661960), (2, 7830980), (4, 3915490), (5, 3132392), (8, 1957745), (10, 1566196), (20, 783098), (40, 391549), (311, 50360), (622, 25180), (1244, 12590), (1259, 12440), (1555, 10072), (2488, 6295), (2518, 6220), (3110, 5036)]