20504920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12503}}^1$

素因数の和:12555

約数の個数: 32

約数和(自身を含む): 47265120

約数和(自身を除く): 26760200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12503, 25006, 50012, 62515, 100024, 125030, 250060, 500120, 512623, 1025246, 2050492, 2563115, 4100984, 5126230, 10252460, 20504920]

約数ペア:

[(1, 20504920), (2, 10252460), (4, 5126230), (5, 4100984), (8, 2563115), (10, 2050492), (20, 1025246), (40, 512623), (41, 500120), (82, 250060), (164, 125030), (205, 100024), (328, 62515), (410, 50012), (820, 25006), (1640, 12503)]