18390988

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^2\times {\mathrm{71}}^1$

素因数の和:151

約数の個数: 72

約数和(自身を含む): 42142464

約数和(自身を除く): 23751476

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 29, 44, 58, 71, 77, 116, 142, 154, 203, 284, 308, 319, 406, 497, 638, 781, 812, 841, 994, 1276, 1562, 1682, 1988, 2059, 2233, 3124, 3364, 4118, 4466, 5467, 5887, 8236, 8932, 9251, 10934, 11774, 14413, 18502, 21868, 22649, 23548, 28826, 37004, 45298, 57652, 59711, 64757, 90596, 119422, 129514, 158543, 238844, 259028, 317086, 417977, 634172, 656821, 835954, 1313642, 1671908, 2627284, 4597747, 9195494, 18390988]

約数ペア:

[(1, 18390988), (2, 9195494), (4, 4597747), (7, 2627284), (11, 1671908), (14, 1313642), (22, 835954), (28, 656821), (29, 634172), (44, 417977), (58, 317086), (71, 259028), (77, 238844), (116, 158543), (142, 129514), (154, 119422), (203, 90596), (284, 64757), (308, 59711), (319, 57652), (406, 45298), (497, 37004), (638, 28826), (781, 23548), (812, 22649), (841, 21868), (994, 18502), (1276, 14413), (1562, 11774), (1682, 10934), (1988, 9251), (2059, 8932), (2233, 8236), (3124, 5887), (3364, 5467), (4118, 4466)]