21780100

素因数分解:

$2^2\times 5^2\times {\mathrm{353}}^1\times {\mathrm{617}}^1$

素因数の和:984

約数の個数: 36

約数和(自身を含む): 47473524

約数和(自身を除く): 25693424

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 353, 617, 706, 1234, 1412, 1765, 2468, 3085, 3530, 6170, 7060, 8825, 12340, 15425, 17650, 30850, 35300, 61700, 217801, 435602, 871204, 1089005, 2178010, 4356020, 5445025, 10890050, 21780100]

約数ペア:

[(1, 21780100), (2, 10890050), (4, 5445025), (5, 4356020), (10, 2178010), (20, 1089005), (25, 871204), (50, 435602), (100, 217801), (353, 61700), (617, 35300), (706, 30850), (1234, 17650), (1412, 15425), (1765, 12340), (2468, 8825), (3085, 7060), (3530, 6170)]