20393920

素因数分解:

$2^6\times 5^1\times {\mathrm{101}}^1\times {\mathrm{631}}^1$

素因数の和:749

約数の個数: 56

約数和(自身を含む): 49121568

約数和(自身を除く): 28727648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 160, 202, 320, 404, 505, 631, 808, 1010, 1262, 1616, 2020, 2524, 3155, 3232, 4040, 5048, 6310, 6464, 8080, 10096, 12620, 16160, 20192, 25240, 32320, 40384, 50480, 63731, 100960, 127462, 201920, 254924, 318655, 509848, 637310, 1019696, 1274620, 2039392, 2549240, 4078784, 5098480, 10196960, 20393920]

約数ペア:

[(1, 20393920), (2, 10196960), (4, 5098480), (5, 4078784), (8, 2549240), (10, 2039392), (16, 1274620), (20, 1019696), (32, 637310), (40, 509848), (64, 318655), (80, 254924), (101, 201920), (160, 127462), (202, 100960), (320, 63731), (404, 50480), (505, 40384), (631, 32320), (808, 25240), (1010, 20192), (1262, 16160), (1616, 12620), (2020, 10096), (2524, 8080), (3155, 6464), (3232, 6310), (4040, 5048)]