21791140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{5021}}^1$

素因数の和:5068

約数の個数: 48

約数和(自身を含む): 53996544

約数和(自身を除く): 32205404

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 5021, 10042, 20084, 25105, 35147, 50210, 70294, 100420, 140588, 155651, 175735, 311302, 351470, 622604, 702940, 778255, 1089557, 1556510, 2179114, 3113020, 4358228, 5447785, 10895570, 21791140]

約数ペア:

[(1, 21791140), (2, 10895570), (4, 5447785), (5, 4358228), (7, 3113020), (10, 2179114), (14, 1556510), (20, 1089557), (28, 778255), (31, 702940), (35, 622604), (62, 351470), (70, 311302), (124, 175735), (140, 155651), (155, 140588), (217, 100420), (310, 70294), (434, 50210), (620, 35147), (868, 25105), (1085, 20084), (2170, 10042), (4340, 5021)]