20291900

素因数分解:

$2^2\times 5^2\times {\mathrm{131}}^1\times {\mathrm{1549}}^1$

素因数の和:1694

約数の個数: 36

約数和(自身を含む): 44398200

約数和(自身を除く): 24106300

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 131, 262, 524, 655, 1310, 1549, 2620, 3098, 3275, 6196, 6550, 7745, 13100, 15490, 30980, 38725, 77450, 154900, 202919, 405838, 811676, 1014595, 2029190, 4058380, 5072975, 10145950, 20291900]

約数ペア:

[(1, 20291900), (2, 10145950), (4, 5072975), (5, 4058380), (10, 2029190), (20, 1014595), (25, 811676), (50, 405838), (100, 202919), (131, 154900), (262, 77450), (524, 38725), (655, 30980), (1310, 15490), (1549, 13100), (2620, 7745), (3098, 6550), (3275, 6196)]