161905480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{227}}^1\times {\mathrm{1621}}^1$

素因数の和:1870

約数の個数: 64

約数和(自身を含む): 399401280

約数和(自身を除く): 237495800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 227, 440, 454, 908, 1135, 1621, 1816, 2270, 2497, 3242, 4540, 4994, 6484, 8105, 9080, 9988, 12485, 12968, 16210, 17831, 19976, 24970, 32420, 35662, 49940, 64840, 71324, 89155, 99880, 142648, 178310, 356620, 367967, 713240, 735934, 1471868, 1839835, 2943736, 3679670, 4047637, 7359340, 8095274, 14718680, 16190548, 20238185, 32381096, 40476370, 80952740, 161905480]

約数ペア:

[(1, 161905480), (2, 80952740), (4, 40476370), (5, 32381096), (8, 20238185), (10, 16190548), (11, 14718680), (20, 8095274), (22, 7359340), (40, 4047637), (44, 3679670), (55, 2943736), (88, 1839835), (110, 1471868), (220, 735934), (227, 713240), (440, 367967), (454, 356620), (908, 178310), (1135, 142648), (1621, 99880), (1816, 89155), (2270, 71324), (2497, 64840), (3242, 49940), (4540, 35662), (4994, 32420), (6484, 24970), (8105, 19976), (9080, 17831), (9988, 16210), (12485, 12968)]