21897180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{509}}^1$

素因数の和:763

約数の個数: 72

約数和(自身を含む): 66830400

約数和(自身を除く): 44933220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 239, 478, 509, 717, 956, 1018, 1195, 1434, 1527, 2036, 2151, 2390, 2545, 2868, 3054, 3585, 4302, 4581, 4780, 5090, 6108, 7170, 7635, 8604, 9162, 10180, 10755, 14340, 15270, 18324, 21510, 22905, 30540, 43020, 45810, 91620, 121651, 243302, 364953, 486604, 608255, 729906, 1094859, 1216510, 1459812, 1824765, 2189718, 2433020, 3649530, 4379436, 5474295, 7299060, 10948590, 21897180]

約数ペア:

[(1, 21897180), (2, 10948590), (3, 7299060), (4, 5474295), (5, 4379436), (6, 3649530), (9, 2433020), (10, 2189718), (12, 1824765), (15, 1459812), (18, 1216510), (20, 1094859), (30, 729906), (36, 608255), (45, 486604), (60, 364953), (90, 243302), (180, 121651), (239, 91620), (478, 45810), (509, 43020), (717, 30540), (956, 22905), (1018, 21510), (1195, 18324), (1434, 15270), (1527, 14340), (2036, 10755), (2151, 10180), (2390, 9162), (2545, 8604), (2868, 7635), (3054, 7170), (3585, 6108), (4302, 5090), (4581, 4780)]