18727760

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1787}}^1$

素因数の和:1931

約数の個数: 40

約数和(自身を含む): 43898976

約数和(自身を除く): 25171216

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 1787, 2096, 2620, 3574, 5240, 7148, 8935, 10480, 14296, 17870, 28592, 35740, 71480, 142960, 234097, 468194, 936388, 1170485, 1872776, 2340970, 3745552, 4681940, 9363880, 18727760]

約数ペア:

[(1, 18727760), (2, 9363880), (4, 4681940), (5, 3745552), (8, 2340970), (10, 1872776), (16, 1170485), (20, 936388), (40, 468194), (80, 234097), (131, 142960), (262, 71480), (524, 35740), (655, 28592), (1048, 17870), (1310, 14296), (1787, 10480), (2096, 8935), (2620, 7148), (3574, 5240)]