21989380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6829}}^1$

素因数の和:6868

約数の個数: 48

約数和(自身を含む): 55077120

約数和(自身を除く): 33087740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6829, 13658, 27316, 34145, 47803, 68290, 95606, 136580, 157067, 191212, 239015, 314134, 478030, 628268, 785335, 956060, 1099469, 1570670, 2198938, 3141340, 4397876, 5497345, 10994690, 21989380]

約数ペア:

[(1, 21989380), (2, 10994690), (4, 5497345), (5, 4397876), (7, 3141340), (10, 2198938), (14, 1570670), (20, 1099469), (23, 956060), (28, 785335), (35, 628268), (46, 478030), (70, 314134), (92, 239015), (115, 191212), (140, 157067), (161, 136580), (230, 95606), (322, 68290), (460, 47803), (644, 34145), (805, 27316), (1610, 13658), (3220, 6829)]