21514988

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{71}}^2\times {\mathrm{97}}^1$

素因数の和:254

約数の個数: 36

約数和(自身を含む): 42090216

約数和(自身を除く): 20575228

約数列:

[1, 2, 4, 11, 22, 44, 71, 97, 142, 194, 284, 388, 781, 1067, 1562, 2134, 3124, 4268, 5041, 6887, 10082, 13774, 20164, 27548, 55451, 75757, 110902, 151514, 221804, 303028, 488977, 977954, 1955908, 5378747, 10757494, 21514988]

約数ペア:

[(1, 21514988), (2, 10757494), (4, 5378747), (11, 1955908), (22, 977954), (44, 488977), (71, 303028), (97, 221804), (142, 151514), (194, 110902), (284, 75757), (388, 55451), (781, 27548), (1067, 20164), (1562, 13774), (2134, 10082), (3124, 6887), (4268, 5041)]