20496668

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{37}}^2\times {\mathrm{197}}^1$

素因数の和:294

約数の個数: 36

約数和(自身を含む): 39002040

約数和(自身を除く): 18505372

約数列:

[1, 2, 4, 19, 37, 38, 74, 76, 148, 197, 394, 703, 788, 1369, 1406, 2738, 2812, 3743, 5476, 7289, 7486, 14578, 14972, 26011, 29156, 52022, 104044, 138491, 269693, 276982, 539386, 553964, 1078772, 5124167, 10248334, 20496668]

約数ペア:

[(1, 20496668), (2, 10248334), (4, 5124167), (19, 1078772), (37, 553964), (38, 539386), (74, 276982), (76, 269693), (148, 138491), (197, 104044), (394, 52022), (703, 29156), (788, 26011), (1369, 14972), (1406, 14578), (2738, 7486), (2812, 7289), (3743, 5476)]