21383132080

素因数分解:

$2^4\times 5^1\times {\mathrm{521}}^1\times {\mathrm{513031}}^1$

素因数の和:513565

約数の個数: 40

約数和(自身を含む): 49811302944

約数和(自身を除く): 28428170864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 521, 1042, 2084, 2605, 4168, 5210, 8336, 10420, 20840, 41680, 513031, 1026062, 2052124, 2565155, 4104248, 5130310, 8208496, 10260620, 20521240, 41042480, 267289151, 534578302, 1069156604, 1336445755, 2138313208, 2672891510, 4276626416, 5345783020, 10691566040, 21383132080]

約数ペア:

[(1, 21383132080), (2, 10691566040), (4, 5345783020), (5, 4276626416), (8, 2672891510), (10, 2138313208), (16, 1336445755), (20, 1069156604), (40, 534578302), (80, 267289151), (521, 41042480), (1042, 20521240), (2084, 10260620), (2605, 8208496), (4168, 5130310), (5210, 4104248), (8336, 2565155), (10420, 2052124), (20840, 1026062), (41680, 513031)]