21818020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1543}}^1$

素因数の和:1660

約数の個数: 48

約数和(自身を含む): 52915968

約数和(自身を除く): 31097948

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 202, 404, 505, 707, 1010, 1414, 1543, 2020, 2828, 3086, 3535, 6172, 7070, 7715, 10801, 14140, 15430, 21602, 30860, 43204, 54005, 108010, 155843, 216020, 311686, 623372, 779215, 1090901, 1558430, 2181802, 3116860, 4363604, 5454505, 10909010, 21818020]

約数ペア:

[(1, 21818020), (2, 10909010), (4, 5454505), (5, 4363604), (7, 3116860), (10, 2181802), (14, 1558430), (20, 1090901), (28, 779215), (35, 623372), (70, 311686), (101, 216020), (140, 155843), (202, 108010), (404, 54005), (505, 43204), (707, 30860), (1010, 21602), (1414, 15430), (1543, 14140), (2020, 10801), (2828, 7715), (3086, 7070), (3535, 6172)]