21030009

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1$

素因数の和:230

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 17677191

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 47, 77, 91, 141, 143, 149, 231, 273, 329, 429, 447, 517, 611, 987, 1001, 1043, 1551, 1639, 1833, 1937, 3003, 3129, 3619, 4277, 4917, 5811, 6721, 7003, 10857, 11473, 12831, 13559, 20163, 21009, 21307, 34419, 40677, 47047, 49021, 63921, 77033, 91039, 141141, 147063, 149149, 231099, 273117, 447447, 539231, 637273, 1001429, 1617693, 1911819, 3004287, 7010003, 21030009]

約数ペア:

[(1, 21030009), (3, 7010003), (7, 3004287), (11, 1911819), (13, 1617693), (21, 1001429), (33, 637273), (39, 539231), (47, 447447), (77, 273117), (91, 231099), (141, 149149), (143, 147063), (149, 141141), (231, 91039), (273, 77033), (329, 63921), (429, 49021), (447, 47047), (517, 40677), (611, 34419), (987, 21307), (1001, 21009), (1043, 20163), (1551, 13559), (1639, 12831), (1833, 11473), (1937, 10857), (3003, 7003), (3129, 6721), (3619, 5811), (4277, 4917)]