21918897

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{811}}^1$

素因数の和:851

約数の個数: 64

約数和(自身を含む): 43653120

約数和(自身を除く): 21734223

約数列:

[1, 3, 7, 9, 11, 13, 21, 27, 33, 39, 63, 77, 91, 99, 117, 143, 189, 231, 273, 297, 351, 429, 693, 811, 819, 1001, 1287, 2079, 2433, 2457, 3003, 3861, 5677, 7299, 8921, 9009, 10543, 17031, 21897, 26763, 27027, 31629, 51093, 62447, 73801, 80289, 94887, 115973, 153279, 187341, 221403, 240867, 284661, 347919, 562023, 664209, 811811, 1043757, 1686069, 1992627, 2435433, 3131271, 7306299, 21918897]

約数ペア:

[(1, 21918897), (3, 7306299), (7, 3131271), (9, 2435433), (11, 1992627), (13, 1686069), (21, 1043757), (27, 811811), (33, 664209), (39, 562023), (63, 347919), (77, 284661), (91, 240867), (99, 221403), (117, 187341), (143, 153279), (189, 115973), (231, 94887), (273, 80289), (297, 73801), (351, 62447), (429, 51093), (693, 31629), (811, 27027), (819, 26763), (1001, 21897), (1287, 17031), (2079, 10543), (2433, 9009), (2457, 8921), (3003, 7299), (3861, 5677)]