263221497

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{19991}}^1$

素因数の和:20034

約数の個数: 48

約数和(自身を含む): 499000320

約数和(自身を除く): 235778823

約数列:

[1, 3, 7, 9, 11, 19, 21, 33, 57, 63, 77, 99, 133, 171, 209, 231, 399, 627, 693, 1197, 1463, 1881, 4389, 13167, 19991, 59973, 139937, 179919, 219901, 379829, 419811, 659703, 1139487, 1259433, 1539307, 1979109, 2658803, 3418461, 4178119, 4617921, 7976409, 12534357, 13853763, 23929227, 29246833, 37603071, 87740499, 263221497]

約数ペア:

[(1, 263221497), (3, 87740499), (7, 37603071), (9, 29246833), (11, 23929227), (19, 13853763), (21, 12534357), (33, 7976409), (57, 4617921), (63, 4178119), (77, 3418461), (99, 2658803), (133, 1979109), (171, 1539307), (209, 1259433), (231, 1139487), (399, 659703), (627, 419811), (693, 379829), (1197, 219901), (1463, 179919), (1881, 139937), (4389, 59973), (13167, 19991)]