840400

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{191}}^1$

素因数の和:220

約数の個数: 60

約数和(自身を含む): 2214144

約数和(自身を除く): 1373744

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 80, 88, 100, 110, 176, 191, 200, 220, 275, 382, 400, 440, 550, 764, 880, 955, 1100, 1528, 1910, 2101, 2200, 3056, 3820, 4202, 4400, 4775, 7640, 8404, 9550, 10505, 15280, 16808, 19100, 21010, 33616, 38200, 42020, 52525, 76400, 84040, 105050, 168080, 210100, 420200, 840400]

約数ペア:

[(1, 840400), (2, 420200), (4, 210100), (5, 168080), (8, 105050), (10, 84040), (11, 76400), (16, 52525), (20, 42020), (22, 38200), (25, 33616), (40, 21010), (44, 19100), (50, 16808), (55, 15280), (80, 10505), (88, 9550), (100, 8404), (110, 7640), (176, 4775), (191, 4400), (200, 4202), (220, 3820), (275, 3056), (382, 2200), (400, 2101), (440, 1910), (550, 1528), (764, 1100), (880, 955)]