20981340

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{2843}}^1$

素因数の和:2899

約数の個数: 72

約数和(自身を含む): 65218608

約数和(自身を除く): 44237268

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 41, 45, 60, 82, 90, 123, 164, 180, 205, 246, 369, 410, 492, 615, 738, 820, 1230, 1476, 1845, 2460, 2843, 3690, 5686, 7380, 8529, 11372, 14215, 17058, 25587, 28430, 34116, 42645, 51174, 56860, 85290, 102348, 116563, 127935, 170580, 233126, 255870, 349689, 466252, 511740, 582815, 699378, 1049067, 1165630, 1398756, 1748445, 2098134, 2331260, 3496890, 4196268, 5245335, 6993780, 10490670, 20981340]

約数ペア:

[(1, 20981340), (2, 10490670), (3, 6993780), (4, 5245335), (5, 4196268), (6, 3496890), (9, 2331260), (10, 2098134), (12, 1748445), (15, 1398756), (18, 1165630), (20, 1049067), (30, 699378), (36, 582815), (41, 511740), (45, 466252), (60, 349689), (82, 255870), (90, 233126), (123, 170580), (164, 127935), (180, 116563), (205, 102348), (246, 85290), (369, 56860), (410, 51174), (492, 42645), (615, 34116), (738, 28430), (820, 25587), (1230, 17058), (1476, 14215), (1845, 11372), (2460, 8529), (2843, 7380), (3690, 5686)]