21734780

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{199}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 47308800

約数和(自身を除く): 25574020

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 127, 172, 199, 215, 254, 398, 430, 508, 635, 796, 860, 995, 1270, 1990, 2540, 3980, 5461, 8557, 10922, 17114, 21844, 25273, 27305, 34228, 42785, 50546, 54610, 85570, 101092, 109220, 126365, 171140, 252730, 505460, 1086739, 2173478, 4346956, 5433695, 10867390, 21734780]

約数ペア:

[(1, 21734780), (2, 10867390), (4, 5433695), (5, 4346956), (10, 2173478), (20, 1086739), (43, 505460), (86, 252730), (127, 171140), (172, 126365), (199, 109220), (215, 101092), (254, 85570), (398, 54610), (430, 50546), (508, 42785), (635, 34228), (796, 27305), (860, 25273), (995, 21844), (1270, 17114), (1990, 10922), (2540, 8557), (3980, 5461)]