19927180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{10949}}^1$

素因数の和:10978

約数の個数: 48

約数和(自身を含む): 51508800

約数和(自身を除く): 31581620

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 10949, 21898, 43796, 54745, 76643, 109490, 142337, 153286, 218980, 284674, 306572, 383215, 569348, 711685, 766430, 996359, 1423370, 1532860, 1992718, 2846740, 3985436, 4981795, 9963590, 19927180]

約数ペア:

[(1, 19927180), (2, 9963590), (4, 4981795), (5, 3985436), (7, 2846740), (10, 1992718), (13, 1532860), (14, 1423370), (20, 996359), (26, 766430), (28, 711685), (35, 569348), (52, 383215), (65, 306572), (70, 284674), (91, 218980), (130, 153286), (140, 142337), (182, 109490), (260, 76643), (364, 54745), (455, 43796), (910, 21898), (1820, 10949)]