20940400

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{4027}}^1$

素因数の和:4058

約数の個数: 60

約数和(自身を含む): 54192712

約数和(自身を除く): 33252312

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 260, 325, 400, 520, 650, 1040, 1300, 2600, 4027, 5200, 8054, 16108, 20135, 32216, 40270, 52351, 64432, 80540, 100675, 104702, 161080, 201350, 209404, 261755, 322160, 402700, 418808, 523510, 805400, 837616, 1047020, 1308775, 1610800, 2094040, 2617550, 4188080, 5235100, 10470200, 20940400]

約数ペア:

[(1, 20940400), (2, 10470200), (4, 5235100), (5, 4188080), (8, 2617550), (10, 2094040), (13, 1610800), (16, 1308775), (20, 1047020), (25, 837616), (26, 805400), (40, 523510), (50, 418808), (52, 402700), (65, 322160), (80, 261755), (100, 209404), (104, 201350), (130, 161080), (200, 104702), (208, 100675), (260, 80540), (325, 64432), (400, 52351), (520, 40270), (650, 32216), (1040, 20135), (1300, 16108), (2600, 8054), (4027, 5200)]