197981960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{449959}}^1$

素因数の和:449981

約数の個数: 32

約数和(自身を含む): 485956800

約数和(自身を除く): 287974840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 449959, 899918, 1799836, 2249795, 3599672, 4499590, 4949549, 8999180, 9899098, 17998360, 19798196, 24747745, 39596392, 49495490, 98990980, 197981960]

約数ペア:

[(1, 197981960), (2, 98990980), (4, 49495490), (5, 39596392), (8, 24747745), (10, 19798196), (11, 17998360), (20, 9899098), (22, 8999180), (40, 4949549), (44, 4499590), (55, 3599672), (88, 2249795), (110, 1799836), (220, 899918), (440, 449959)]