19675940

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{167}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 42844032

約数和(自身を除く): 23168092

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 137, 167, 172, 215, 274, 334, 430, 548, 668, 685, 835, 860, 1370, 1670, 2740, 3340, 5891, 7181, 11782, 14362, 22879, 23564, 28724, 29455, 35905, 45758, 58910, 71810, 91516, 114395, 117820, 143620, 228790, 457580, 983797, 1967594, 3935188, 4918985, 9837970, 19675940]

約数ペア:

[(1, 19675940), (2, 9837970), (4, 4918985), (5, 3935188), (10, 1967594), (20, 983797), (43, 457580), (86, 228790), (137, 143620), (167, 117820), (172, 114395), (215, 91516), (274, 71810), (334, 58910), (430, 45758), (548, 35905), (668, 29455), (685, 28724), (835, 23564), (860, 22879), (1370, 14362), (1670, 11782), (2740, 7181), (3340, 5891)]