21045320

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30949}}^1$

素因数の和:30977

約数の個数: 32

約数和(自身を含む): 50139000

約数和(自身を除く): 29093680

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30949, 61898, 123796, 154745, 247592, 309490, 526133, 618980, 1052266, 1237960, 2104532, 2630665, 4209064, 5261330, 10522660, 21045320]

約数ペア:

[(1, 21045320), (2, 10522660), (4, 5261330), (5, 4209064), (8, 2630665), (10, 2104532), (17, 1237960), (20, 1052266), (34, 618980), (40, 526133), (68, 309490), (85, 247592), (136, 154745), (170, 123796), (340, 61898), (680, 30949)]