20719480

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1$

素因数の和:268

約数の個数: 64

約数和(自身を含む): 48522240

約数和(自身を除く): 27802760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 103, 107, 188, 206, 214, 235, 376, 412, 428, 470, 515, 535, 824, 856, 940, 1030, 1070, 1880, 2060, 2140, 4120, 4280, 4841, 5029, 9682, 10058, 11021, 19364, 20116, 22042, 24205, 25145, 38728, 40232, 44084, 48410, 50290, 55105, 88168, 96820, 100580, 110210, 193640, 201160, 220420, 440840, 517987, 1035974, 2071948, 2589935, 4143896, 5179870, 10359740, 20719480]

約数ペア:

[(1, 20719480), (2, 10359740), (4, 5179870), (5, 4143896), (8, 2589935), (10, 2071948), (20, 1035974), (40, 517987), (47, 440840), (94, 220420), (103, 201160), (107, 193640), (188, 110210), (206, 100580), (214, 96820), (235, 88168), (376, 55105), (412, 50290), (428, 48410), (470, 44084), (515, 40232), (535, 38728), (824, 25145), (856, 24205), (940, 22042), (1030, 20116), (1070, 19364), (1880, 11021), (2060, 10058), (2140, 9682), (4120, 5029), (4280, 4841)]