18740420

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{15361}}^1$

素因数の和:15431

約数の個数: 24

約数和(自身を含む): 40002648

約数和(自身を除く): 21262228

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 15361, 30722, 61444, 76805, 153610, 307220, 937021, 1874042, 3748084, 4685105, 9370210, 18740420]

約数ペア:

[(1, 18740420), (2, 9370210), (4, 4685105), (5, 3748084), (10, 1874042), (20, 937021), (61, 307220), (122, 153610), (244, 76805), (305, 61444), (610, 30722), (1220, 15361)]