20501500

素因数分解:

$2^2\times 5^3\times {\mathrm{131}}^1\times {\mathrm{313}}^1$

素因数の和:463

約数の個数: 48

約数和(自身を含む): 45261216

約数和(自身を除く): 24759716

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 131, 250, 262, 313, 500, 524, 626, 655, 1252, 1310, 1565, 2620, 3130, 3275, 6260, 6550, 7825, 13100, 15650, 16375, 31300, 32750, 39125, 41003, 65500, 78250, 82006, 156500, 164012, 205015, 410030, 820060, 1025075, 2050150, 4100300, 5125375, 10250750, 20501500]

約数ペア:

[(1, 20501500), (2, 10250750), (4, 5125375), (5, 4100300), (10, 2050150), (20, 1025075), (25, 820060), (50, 410030), (100, 205015), (125, 164012), (131, 156500), (250, 82006), (262, 78250), (313, 65500), (500, 41003), (524, 39125), (626, 32750), (655, 31300), (1252, 16375), (1310, 15650), (1565, 13100), (2620, 7825), (3130, 6550), (3275, 6260)]