21040400

素因数分解:

$2^4\times 5^2\times {\mathrm{23}}^1\times {\mathrm{2287}}^1$

素因数の和:2328

約数の個数: 60

約数和(自身を含む): 52770432

約数和(自身を除く): 31730032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 25, 40, 46, 50, 80, 92, 100, 115, 184, 200, 230, 368, 400, 460, 575, 920, 1150, 1840, 2287, 2300, 4574, 4600, 9148, 9200, 11435, 18296, 22870, 36592, 45740, 52601, 57175, 91480, 105202, 114350, 182960, 210404, 228700, 263005, 420808, 457400, 526010, 841616, 914800, 1052020, 1315025, 2104040, 2630050, 4208080, 5260100, 10520200, 21040400]

約数ペア:

[(1, 21040400), (2, 10520200), (4, 5260100), (5, 4208080), (8, 2630050), (10, 2104040), (16, 1315025), (20, 1052020), (23, 914800), (25, 841616), (40, 526010), (46, 457400), (50, 420808), (80, 263005), (92, 228700), (100, 210404), (115, 182960), (184, 114350), (200, 105202), (230, 91480), (368, 57175), (400, 52601), (460, 45740), (575, 36592), (920, 22870), (1150, 18296), (1840, 11435), (2287, 9200), (2300, 9148), (4574, 4600)]