21365540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1511}}^1$

素因数の和:1628

約数の個数: 48

約数和(自身を含む): 51819264

約数和(自身を除く): 30453724

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 202, 404, 505, 707, 1010, 1414, 1511, 2020, 2828, 3022, 3535, 6044, 7070, 7555, 10577, 14140, 15110, 21154, 30220, 42308, 52885, 105770, 152611, 211540, 305222, 610444, 763055, 1068277, 1526110, 2136554, 3052220, 4273108, 5341385, 10682770, 21365540]

約数ペア:

[(1, 21365540), (2, 10682770), (4, 5341385), (5, 4273108), (7, 3052220), (10, 2136554), (14, 1526110), (20, 1068277), (28, 763055), (35, 610444), (70, 305222), (101, 211540), (140, 152611), (202, 105770), (404, 52885), (505, 42308), (707, 30220), (1010, 21154), (1414, 15110), (1511, 14140), (2020, 10577), (2828, 7555), (3022, 7070), (3535, 6044)]