21204183

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{307}}^1$

素因数の和:364

約数の個数: 64

約数和(自身を含む): 39739392

約数和(自身を除く): 18535209

約数列:

[1, 3, 7, 11, 13, 21, 23, 33, 39, 69, 77, 91, 143, 161, 231, 253, 273, 299, 307, 429, 483, 759, 897, 921, 1001, 1771, 2093, 2149, 3003, 3289, 3377, 3991, 5313, 6279, 6447, 7061, 9867, 10131, 11973, 21183, 23023, 23639, 27937, 43901, 49427, 69069, 70917, 77671, 83811, 91793, 131703, 148281, 233013, 275379, 307307, 543697, 642551, 921921, 1009723, 1631091, 1927653, 3029169, 7068061, 21204183]

約数ペア:

[(1, 21204183), (3, 7068061), (7, 3029169), (11, 1927653), (13, 1631091), (21, 1009723), (23, 921921), (33, 642551), (39, 543697), (69, 307307), (77, 275379), (91, 233013), (143, 148281), (161, 131703), (231, 91793), (253, 83811), (273, 77671), (299, 70917), (307, 69069), (429, 49427), (483, 43901), (759, 27937), (897, 23639), (921, 23023), (1001, 21183), (1771, 11973), (2093, 10131), (2149, 9867), (3003, 7061), (3289, 6447), (3377, 6279), (3991, 5313)]