689780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{379}}^1$

素因数の和:408

約数の個数: 48

約数和(自身を含む): 1787520

約数和(自身を除く): 1097740

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 379, 455, 758, 910, 1516, 1820, 1895, 2653, 3790, 4927, 5306, 7580, 9854, 10612, 13265, 19708, 24635, 26530, 34489, 49270, 53060, 68978, 98540, 137956, 172445, 344890, 689780]

約数ペア:

[(1, 689780), (2, 344890), (4, 172445), (5, 137956), (7, 98540), (10, 68978), (13, 53060), (14, 49270), (20, 34489), (26, 26530), (28, 24635), (35, 19708), (52, 13265), (65, 10612), (70, 9854), (91, 7580), (130, 5306), (140, 4927), (182, 3790), (260, 2653), (364, 1895), (379, 1820), (455, 1516), (758, 910)]