21480420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27539}}^1$

素因数の和:27564

約数の個数: 48

約数和(自身を含む): 64774080

約数和(自身を除く): 43293660

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27539, 55078, 82617, 110156, 137695, 165234, 275390, 330468, 358007, 413085, 550780, 716014, 826170, 1074021, 1432028, 1652340, 1790035, 2148042, 3580070, 4296084, 5370105, 7160140, 10740210, 21480420]

約数ペア:

[(1, 21480420), (2, 10740210), (3, 7160140), (4, 5370105), (5, 4296084), (6, 3580070), (10, 2148042), (12, 1790035), (13, 1652340), (15, 1432028), (20, 1074021), (26, 826170), (30, 716014), (39, 550780), (52, 413085), (60, 358007), (65, 330468), (78, 275390), (130, 165234), (156, 137695), (195, 110156), (260, 82617), (390, 55078), (780, 27539)]