990640040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1905077}}^1$

素因数の和:1905101

約数の個数: 32

約数和(自身を含む): 2400398280

約数和(自身を除く): 1409758240

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1905077, 3810154, 7620308, 9525385, 15240616, 19050770, 24766001, 38101540, 49532002, 76203080, 99064004, 123830005, 198128008, 247660010, 495320020, 990640040]

約数ペア:

[(1, 990640040), (2, 495320020), (4, 247660010), (5, 198128008), (8, 123830005), (10, 99064004), (13, 76203080), (20, 49532002), (26, 38101540), (40, 24766001), (52, 19050770), (65, 15240616), (104, 9525385), (130, 7620308), (260, 3810154), (520, 1905077)]