21491220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{7621}}^1$

素因数の和:7680

約数の個数: 48

約数和(自身を含む): 61463808

約数和(自身を除く): 39972588

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 47, 60, 94, 141, 188, 235, 282, 470, 564, 705, 940, 1410, 2820, 7621, 15242, 22863, 30484, 38105, 45726, 76210, 91452, 114315, 152420, 228630, 358187, 457260, 716374, 1074561, 1432748, 1790935, 2149122, 3581870, 4298244, 5372805, 7163740, 10745610, 21491220]

約数ペア:

[(1, 21491220), (2, 10745610), (3, 7163740), (4, 5372805), (5, 4298244), (6, 3581870), (10, 2149122), (12, 1790935), (15, 1432748), (20, 1074561), (30, 716374), (47, 457260), (60, 358187), (94, 228630), (141, 152420), (188, 114315), (235, 91452), (282, 76210), (470, 45726), (564, 38105), (705, 30484), (940, 22863), (1410, 15242), (2820, 7621)]