21512540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{4153}}^1$

素因数の和:4206

約数の個数: 48

約数和(自身を含む): 53038272

約数和(自身を除く): 31525732

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 4153, 5180, 8306, 16612, 20765, 29071, 41530, 58142, 83060, 116284, 145355, 153661, 290710, 307322, 581420, 614644, 768305, 1075627, 1536610, 2151254, 3073220, 4302508, 5378135, 10756270, 21512540]

約数ペア:

[(1, 21512540), (2, 10756270), (4, 5378135), (5, 4302508), (7, 3073220), (10, 2151254), (14, 1536610), (20, 1075627), (28, 768305), (35, 614644), (37, 581420), (70, 307322), (74, 290710), (140, 153661), (148, 145355), (185, 116284), (259, 83060), (370, 58142), (518, 41530), (740, 29071), (1036, 20765), (1295, 16612), (2590, 8306), (4153, 5180)]