390804880

素因数分解:

$2^4\times 5^1\times {\mathrm{641}}^1\times {\mathrm{7621}}^1$

素因数の和:8275

約数の個数: 40

約数和(自身を含む): 910158264

約数和(自身を除く): 519353384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 641, 1282, 2564, 3205, 5128, 6410, 7621, 10256, 12820, 15242, 25640, 30484, 38105, 51280, 60968, 76210, 121936, 152420, 304840, 609680, 4885061, 9770122, 19540244, 24425305, 39080488, 48850610, 78160976, 97701220, 195402440, 390804880]

約数ペア:

[(1, 390804880), (2, 195402440), (4, 97701220), (5, 78160976), (8, 48850610), (10, 39080488), (16, 24425305), (20, 19540244), (40, 9770122), (80, 4885061), (641, 609680), (1282, 304840), (2564, 152420), (3205, 121936), (5128, 76210), (6410, 60968), (7621, 51280), (10256, 38105), (12820, 30484), (15242, 25640)]