21000618108

素因数分解:

$2^2\times 3^2\times {\mathrm{61}}^1\times {\mathrm{353}}^1\times {\mathrm{27091}}^1$

素因数の和:27515

約数の個数: 72

約数和(自身を含む): 54109984656

約数和(自身を除く): 33109366548

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 61, 122, 183, 244, 353, 366, 549, 706, 732, 1059, 1098, 1412, 2118, 2196, 3177, 4236, 6354, 12708, 21533, 27091, 43066, 54182, 64599, 81273, 86132, 108364, 129198, 162546, 193797, 243819, 258396, 325092, 387594, 487638, 775188, 975276, 1652551, 3305102, 4957653, 6610204, 9563123, 9915306, 14872959, 19126246, 19830612, 28689369, 29745918, 38252492, 57378738, 59491836, 86068107, 114757476, 172136214, 344272428, 583350503, 1166701006, 1750051509, 2333402012, 3500103018, 5250154527, 7000206036, 10500309054, 21000618108]

約数ペア:

[(1, 21000618108), (2, 10500309054), (3, 7000206036), (4, 5250154527), (6, 3500103018), (9, 2333402012), (12, 1750051509), (18, 1166701006), (36, 583350503), (61, 344272428), (122, 172136214), (183, 114757476), (244, 86068107), (353, 59491836), (366, 57378738), (549, 38252492), (706, 29745918), (732, 28689369), (1059, 19830612), (1098, 19126246), (1412, 14872959), (2118, 9915306), (2196, 9563123), (3177, 6610204), (4236, 4957653), (6354, 3305102), (12708, 1652551), (21533, 975276), (27091, 775188), (43066, 487638), (54182, 387594), (64599, 325092), (81273, 258396), (86132, 243819), (108364, 193797), (129198, 162546)]