21384920

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{6007}}^1$

素因数の和:6107

約数の個数: 32

約数和(自身を含む): 48664800

約数和(自身を除く): 27279880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 6007, 12014, 24028, 30035, 48056, 60070, 120140, 240280, 534623, 1069246, 2138492, 2673115, 4276984, 5346230, 10692460, 21384920]

約数ペア:

[(1, 21384920), (2, 10692460), (4, 5346230), (5, 4276984), (8, 2673115), (10, 2138492), (20, 1069246), (40, 534623), (89, 240280), (178, 120140), (356, 60070), (445, 48056), (712, 30035), (890, 24028), (1780, 12014), (3560, 6007)]