20194163840

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1017851}}^1$

素因数の和:1017901

約数の個数: 64

約数和(自身を含む): 49834033920

約数和(自身を除く): 29639870080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1984, 2480, 3968, 4960, 9920, 19840, 1017851, 2035702, 4071404, 5089255, 8142808, 10178510, 16285616, 20357020, 31553381, 32571232, 40714040, 63106762, 65142464, 81428080, 126213524, 130284928, 157766905, 162856160, 252427048, 315533810, 325712320, 504854096, 631067620, 651424640, 1009708192, 1262135240, 2019416384, 2524270480, 4038832768, 5048540960, 10097081920, 20194163840]

約数ペア:

[(1, 20194163840), (2, 10097081920), (4, 5048540960), (5, 4038832768), (8, 2524270480), (10, 2019416384), (16, 1262135240), (20, 1009708192), (31, 651424640), (32, 631067620), (40, 504854096), (62, 325712320), (64, 315533810), (80, 252427048), (124, 162856160), (128, 157766905), (155, 130284928), (160, 126213524), (248, 81428080), (310, 65142464), (320, 63106762), (496, 40714040), (620, 32571232), (640, 31553381), (992, 20357020), (1240, 16285616), (1984, 10178510), (2480, 8142808), (3968, 5089255), (4960, 4071404), (9920, 2035702), (19840, 1017851)]