19826180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{227}}^1\times {\mathrm{397}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 45734976

約数和(自身を除く): 25908796

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 227, 397, 454, 794, 908, 1135, 1588, 1985, 2270, 2497, 3970, 4367, 4540, 4994, 7940, 8734, 9988, 12485, 17468, 21835, 24970, 43670, 49940, 87340, 90119, 180238, 360476, 450595, 901190, 991309, 1802380, 1982618, 3965236, 4956545, 9913090, 19826180]

約数ペア:

[(1, 19826180), (2, 9913090), (4, 4956545), (5, 3965236), (10, 1982618), (11, 1802380), (20, 991309), (22, 901190), (44, 450595), (55, 360476), (110, 180238), (220, 90119), (227, 87340), (397, 49940), (454, 43670), (794, 24970), (908, 21835), (1135, 17468), (1588, 12485), (1985, 9988), (2270, 8734), (2497, 7940), (3970, 4994), (4367, 4540)]