19987100

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{4079}}^1$

素因数の和:4107

約数の個数: 54

約数和(自身を含む): 50465520

約数和(自身を除く): 30478420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 140, 175, 196, 245, 350, 490, 700, 980, 1225, 2450, 4079, 4900, 8158, 16316, 20395, 28553, 40790, 57106, 81580, 101975, 114212, 142765, 199871, 203950, 285530, 399742, 407900, 571060, 713825, 799484, 999355, 1427650, 1998710, 2855300, 3997420, 4996775, 9993550, 19987100]

約数ペア:

[(1, 19987100), (2, 9993550), (4, 4996775), (5, 3997420), (7, 2855300), (10, 1998710), (14, 1427650), (20, 999355), (25, 799484), (28, 713825), (35, 571060), (49, 407900), (50, 399742), (70, 285530), (98, 203950), (100, 199871), (140, 142765), (175, 114212), (196, 101975), (245, 81580), (350, 57106), (490, 40790), (700, 28553), (980, 20395), (1225, 16316), (2450, 8158), (4079, 4900)]