19961240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1669}}^1$

素因数の和:1716

約数の個数: 64

約数和(自身を含む): 50500800

約数和(自身を除く): 30539560

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 23, 26, 40, 46, 52, 65, 92, 104, 115, 130, 184, 230, 260, 299, 460, 520, 598, 920, 1196, 1495, 1669, 2392, 2990, 3338, 5980, 6676, 8345, 11960, 13352, 16690, 21697, 33380, 38387, 43394, 66760, 76774, 86788, 108485, 153548, 173576, 191935, 216970, 307096, 383870, 433940, 499031, 767740, 867880, 998062, 1535480, 1996124, 2495155, 3992248, 4990310, 9980620, 19961240]

約数ペア:

[(1, 19961240), (2, 9980620), (4, 4990310), (5, 3992248), (8, 2495155), (10, 1996124), (13, 1535480), (20, 998062), (23, 867880), (26, 767740), (40, 499031), (46, 433940), (52, 383870), (65, 307096), (92, 216970), (104, 191935), (115, 173576), (130, 153548), (184, 108485), (230, 86788), (260, 76774), (299, 66760), (460, 43394), (520, 38387), (598, 33380), (920, 21697), (1196, 16690), (1495, 13352), (1669, 11960), (2392, 8345), (2990, 6676), (3338, 5980)]