2139940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:228

約数の個数: 48

約数和(自身を含む): 5007744

約数和(自身を除く): 2867804

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 137, 142, 220, 274, 284, 355, 548, 685, 710, 781, 1370, 1420, 1507, 1562, 2740, 3014, 3124, 3905, 6028, 7535, 7810, 9727, 15070, 15620, 19454, 30140, 38908, 48635, 97270, 106997, 194540, 213994, 427988, 534985, 1069970, 2139940]

約数ペア:

[(1, 2139940), (2, 1069970), (4, 534985), (5, 427988), (10, 213994), (11, 194540), (20, 106997), (22, 97270), (44, 48635), (55, 38908), (71, 30140), (110, 19454), (137, 15620), (142, 15070), (220, 9727), (274, 7810), (284, 7535), (355, 6028), (548, 3905), (685, 3124), (710, 3014), (781, 2740), (1370, 1562), (1420, 1507)]