18538840

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{199}}^1$

素因数の和:364

約数の個数: 64

約数和(自身を含む): 44712000

約数和(自身を除く): 26173160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 137, 170, 199, 274, 340, 398, 548, 680, 685, 796, 995, 1096, 1370, 1592, 1990, 2329, 2740, 3383, 3980, 4658, 5480, 6766, 7960, 9316, 11645, 13532, 16915, 18632, 23290, 27064, 27263, 33830, 46580, 54526, 67660, 93160, 109052, 135320, 136315, 218104, 272630, 463471, 545260, 926942, 1090520, 1853884, 2317355, 3707768, 4634710, 9269420, 18538840]

約数ペア:

[(1, 18538840), (2, 9269420), (4, 4634710), (5, 3707768), (8, 2317355), (10, 1853884), (17, 1090520), (20, 926942), (34, 545260), (40, 463471), (68, 272630), (85, 218104), (136, 136315), (137, 135320), (170, 109052), (199, 93160), (274, 67660), (340, 54526), (398, 46580), (548, 33830), (680, 27263), (685, 27064), (796, 23290), (995, 18632), (1096, 16915), (1370, 13532), (1592, 11645), (1990, 9316), (2329, 7960), (2740, 6766), (3383, 5480), (3980, 4658)]