20815396

素因数分解:

$2^2\times 7^2\times {\mathrm{61}}^1\times {\mathrm{1741}}^1$

素因数の和:1820

約数の個数: 36

約数和(自身を含む): 43093596

約数和(自身を除く): 22278200

約数列:

[1, 2, 4, 7, 14, 28, 49, 61, 98, 122, 196, 244, 427, 854, 1708, 1741, 2989, 3482, 5978, 6964, 11956, 12187, 24374, 48748, 85309, 106201, 170618, 212402, 341236, 424804, 743407, 1486814, 2973628, 5203849, 10407698, 20815396]

約数ペア:

[(1, 20815396), (2, 10407698), (4, 5203849), (7, 2973628), (14, 1486814), (28, 743407), (49, 424804), (61, 341236), (98, 212402), (122, 170618), (196, 106201), (244, 85309), (427, 48748), (854, 24374), (1708, 12187), (1741, 11956), (2989, 6964), (3482, 5978)]