20411868160

素因数分解:

$2^{10}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{128603}}^1$

素因数の和:128659

約数の個数: 88

約数和(自身を含む): 50544458496

約数和(自身を除く): 30132590336

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, 1024, 1240, 1280, 1984, 2480, 2560, 3968, 4960, 5120, 7936, 9920, 15872, 19840, 31744, 39680, 79360, 128603, 158720, 257206, 514412, 643015, 1028824, 1286030, 2057648, 2572060, 3986693, 4115296, 5144120, 7973386, 8230592, 10288240, 15946772, 16461184, 19933465, 20576480, 31893544, 32922368, 39866930, 41152960, 63787088, 65844736, 79733860, 82305920, 127574176, 131689472, 159467720, 164611840, 255148352, 318935440, 329223680, 510296704, 637870880, 658447360, 1020593408, 1275741760, 2041186816, 2551483520, 4082373632, 5102967040, 10205934080, 20411868160]

約数ペア:

[(1, 20411868160), (2, 10205934080), (4, 5102967040), (5, 4082373632), (8, 2551483520), (10, 2041186816), (16, 1275741760), (20, 1020593408), (31, 658447360), (32, 637870880), (40, 510296704), (62, 329223680), (64, 318935440), (80, 255148352), (124, 164611840), (128, 159467720), (155, 131689472), (160, 127574176), (248, 82305920), (256, 79733860), (310, 65844736), (320, 63787088), (496, 41152960), (512, 39866930), (620, 32922368), (640, 31893544), (992, 20576480), (1024, 19933465), (1240, 16461184), (1280, 15946772), (1984, 10288240), (2480, 8230592), (2560, 7973386), (3968, 5144120), (4960, 4115296), (5120, 3986693), (7936, 2572060), (9920, 2057648), (15872, 1286030), (19840, 1028824), (31744, 643015), (39680, 514412), (79360, 257206), (128603, 158720)]