20487780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2647}}^1$

素因数の和:2705

約数の個数: 72

約数和(自身を含む): 63615552

約数和(自身を除く): 43127772

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 86, 90, 129, 172, 180, 215, 258, 387, 430, 516, 645, 774, 860, 1290, 1548, 1935, 2580, 2647, 3870, 5294, 7740, 7941, 10588, 13235, 15882, 23823, 26470, 31764, 39705, 47646, 52940, 79410, 95292, 113821, 119115, 158820, 227642, 238230, 341463, 455284, 476460, 569105, 682926, 1024389, 1138210, 1365852, 1707315, 2048778, 2276420, 3414630, 4097556, 5121945, 6829260, 10243890, 20487780]

約数ペア:

[(1, 20487780), (2, 10243890), (3, 6829260), (4, 5121945), (5, 4097556), (6, 3414630), (9, 2276420), (10, 2048778), (12, 1707315), (15, 1365852), (18, 1138210), (20, 1024389), (30, 682926), (36, 569105), (43, 476460), (45, 455284), (60, 341463), (86, 238230), (90, 227642), (129, 158820), (172, 119115), (180, 113821), (215, 95292), (258, 79410), (387, 52940), (430, 47646), (516, 39705), (645, 31764), (774, 26470), (860, 23823), (1290, 15882), (1548, 13235), (1935, 10588), (2580, 7941), (2647, 7740), (3870, 5294)]