20702990

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{167}}^1$

素因数の和:222

約数の個数: 96

約数和(自身を含む): 49641984

約数和(自身を除く): 28938994

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 23, 35, 46, 49, 55, 70, 77, 98, 110, 115, 154, 161, 167, 230, 245, 253, 322, 334, 385, 490, 506, 539, 770, 805, 835, 1078, 1127, 1169, 1265, 1610, 1670, 1771, 1837, 2254, 2338, 2530, 2695, 3542, 3674, 3841, 5390, 5635, 5845, 7682, 8183, 8855, 9185, 11270, 11690, 12397, 12859, 16366, 17710, 18370, 19205, 24794, 25718, 26887, 38410, 40915, 42251, 53774, 61985, 64295, 81830, 84502, 90013, 123970, 128590, 134435, 180026, 188209, 211255, 268870, 295757, 376418, 422510, 450065, 591514, 900130, 941045, 1478785, 1882090, 2070299, 2957570, 4140598, 10351495, 20702990]

約数ペア:

[(1, 20702990), (2, 10351495), (5, 4140598), (7, 2957570), (10, 2070299), (11, 1882090), (14, 1478785), (22, 941045), (23, 900130), (35, 591514), (46, 450065), (49, 422510), (55, 376418), (70, 295757), (77, 268870), (98, 211255), (110, 188209), (115, 180026), (154, 134435), (161, 128590), (167, 123970), (230, 90013), (245, 84502), (253, 81830), (322, 64295), (334, 61985), (385, 53774), (490, 42251), (506, 40915), (539, 38410), (770, 26887), (805, 25718), (835, 24794), (1078, 19205), (1127, 18370), (1169, 17710), (1265, 16366), (1610, 12859), (1670, 12397), (1771, 11690), (1837, 11270), (2254, 9185), (2338, 8855), (2530, 8183), (2695, 7682), (3542, 5845), (3674, 5635), (3841, 5390)]