18829640

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{211}}^1$

素因数の和:342

約数の個数: 64

約数和(自身を含む): 44876160

約数和(自身を除く): 26046520

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 97, 115, 184, 194, 211, 230, 388, 422, 460, 485, 776, 844, 920, 970, 1055, 1688, 1940, 2110, 2231, 3880, 4220, 4462, 4853, 8440, 8924, 9706, 11155, 17848, 19412, 20467, 22310, 24265, 38824, 40934, 44620, 48530, 81868, 89240, 97060, 102335, 163736, 194120, 204670, 409340, 470741, 818680, 941482, 1882964, 2353705, 3765928, 4707410, 9414820, 18829640]

約数ペア:

[(1, 18829640), (2, 9414820), (4, 4707410), (5, 3765928), (8, 2353705), (10, 1882964), (20, 941482), (23, 818680), (40, 470741), (46, 409340), (92, 204670), (97, 194120), (115, 163736), (184, 102335), (194, 97060), (211, 89240), (230, 81868), (388, 48530), (422, 44620), (460, 40934), (485, 38824), (776, 24265), (844, 22310), (920, 20467), (970, 19412), (1055, 17848), (1688, 11155), (1940, 9706), (2110, 8924), (2231, 8440), (3880, 4853), (4220, 4462)]