20211100

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2221}}^1$

素因数の和:2255

約数の個数: 72

約数和(自身を含む): 54003488

約数和(自身を除く): 33792388

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 25, 26, 28, 35, 50, 52, 65, 70, 91, 100, 130, 140, 175, 182, 260, 325, 350, 364, 455, 650, 700, 910, 1300, 1820, 2221, 2275, 4442, 4550, 8884, 9100, 11105, 15547, 22210, 28873, 31094, 44420, 55525, 57746, 62188, 77735, 111050, 115492, 144365, 155470, 202111, 222100, 288730, 310940, 388675, 404222, 577460, 721825, 777350, 808444, 1010555, 1443650, 1554700, 2021110, 2887300, 4042220, 5052775, 10105550, 20211100]

約数ペア:

[(1, 20211100), (2, 10105550), (4, 5052775), (5, 4042220), (7, 2887300), (10, 2021110), (13, 1554700), (14, 1443650), (20, 1010555), (25, 808444), (26, 777350), (28, 721825), (35, 577460), (50, 404222), (52, 388675), (65, 310940), (70, 288730), (91, 222100), (100, 202111), (130, 155470), (140, 144365), (175, 115492), (182, 111050), (260, 77735), (325, 62188), (350, 57746), (364, 55525), (455, 44420), (650, 31094), (700, 28873), (910, 22210), (1300, 15547), (1820, 11105), (2221, 9100), (2275, 8884), (4442, 4550)]