21749980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{337}}^1\times {\mathrm{461}}^1$

素因数の和:814

約数の個数: 48

約数和(自身を含む): 52468416

約数和(自身を除く): 30718436

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 337, 461, 674, 922, 1348, 1685, 1844, 2305, 2359, 3227, 3370, 4610, 4718, 6454, 6740, 9220, 9436, 11795, 12908, 16135, 23590, 32270, 47180, 64540, 155357, 310714, 621428, 776785, 1087499, 1553570, 2174998, 3107140, 4349996, 5437495, 10874990, 21749980]

約数ペア:

[(1, 21749980), (2, 10874990), (4, 5437495), (5, 4349996), (7, 3107140), (10, 2174998), (14, 1553570), (20, 1087499), (28, 776785), (35, 621428), (70, 310714), (140, 155357), (337, 64540), (461, 47180), (674, 32270), (922, 23590), (1348, 16135), (1685, 12908), (1844, 11795), (2305, 9436), (2359, 9220), (3227, 6740), (3370, 6454), (4610, 4718)]