20894932480

素因数分解:

$2^9\times 5^1\times {\mathrm{31}}^1\times {\mathrm{263293}}^1$

素因数の和:263347

約数の個数: 80

約数和(自身を含む): 51715154304

約数和(自身を除く): 30820221824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 992, 1240, 1280, 1984, 2480, 2560, 3968, 4960, 7936, 9920, 15872, 19840, 39680, 79360, 263293, 526586, 1053172, 1316465, 2106344, 2632930, 4212688, 5265860, 8162083, 8425376, 10531720, 16324166, 16850752, 21063440, 32648332, 33701504, 40810415, 42126880, 65296664, 67403008, 81620830, 84253760, 130593328, 134806016, 163241660, 168507520, 261186656, 326483320, 337015040, 522373312, 652966640, 674030080, 1044746624, 1305933280, 2089493248, 2611866560, 4178986496, 5223733120, 10447466240, 20894932480]

約数ペア:

[(1, 20894932480), (2, 10447466240), (4, 5223733120), (5, 4178986496), (8, 2611866560), (10, 2089493248), (16, 1305933280), (20, 1044746624), (31, 674030080), (32, 652966640), (40, 522373312), (62, 337015040), (64, 326483320), (80, 261186656), (124, 168507520), (128, 163241660), (155, 134806016), (160, 130593328), (248, 84253760), (256, 81620830), (310, 67403008), (320, 65296664), (496, 42126880), (512, 40810415), (620, 33701504), (640, 32648332), (992, 21063440), (1240, 16850752), (1280, 16324166), (1984, 10531720), (2480, 8425376), (2560, 8162083), (3968, 5265860), (4960, 4212688), (7936, 2632930), (9920, 2106344), (15872, 1316465), (19840, 1053172), (39680, 526586), (79360, 263293)]