20689740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{839}}^1$

素因数の和:991

約数の個数: 72

約数和(自身を含む): 63292320

約数和(自身を除く): 42602580

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 137, 180, 274, 411, 548, 685, 822, 839, 1233, 1370, 1644, 1678, 2055, 2466, 2517, 2740, 3356, 4110, 4195, 4932, 5034, 6165, 7551, 8220, 8390, 10068, 12330, 12585, 15102, 16780, 24660, 25170, 30204, 37755, 50340, 75510, 114943, 151020, 229886, 344829, 459772, 574715, 689658, 1034487, 1149430, 1379316, 1724145, 2068974, 2298860, 3448290, 4137948, 5172435, 6896580, 10344870, 20689740]

約数ペア:

[(1, 20689740), (2, 10344870), (3, 6896580), (4, 5172435), (5, 4137948), (6, 3448290), (9, 2298860), (10, 2068974), (12, 1724145), (15, 1379316), (18, 1149430), (20, 1034487), (30, 689658), (36, 574715), (45, 459772), (60, 344829), (90, 229886), (137, 151020), (180, 114943), (274, 75510), (411, 50340), (548, 37755), (685, 30204), (822, 25170), (839, 24660), (1233, 16780), (1370, 15102), (1644, 12585), (1678, 12330), (2055, 10068), (2466, 8390), (2517, 8220), (2740, 7551), (3356, 6165), (4110, 5034), (4195, 4932)]