21291327

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^2$

素因数の和:188

約数の個数: 36

約数和(自身を含む): 34122816

約数和(自身を除く): 12831489

約数列:

[1, 3, 9, 17, 31, 51, 67, 93, 153, 201, 279, 527, 603, 1139, 1581, 2077, 3417, 4489, 4743, 6231, 10251, 13467, 18693, 35309, 40401, 76313, 105927, 139159, 228939, 317781, 417477, 686817, 1252431, 2365703, 7097109, 21291327]

約数ペア:

[(1, 21291327), (3, 7097109), (9, 2365703), (17, 1252431), (31, 686817), (51, 417477), (67, 317781), (93, 228939), (153, 139159), (201, 105927), (279, 76313), (527, 40401), (603, 35309), (1139, 18693), (1581, 13467), (2077, 10251), (3417, 6231), (4489, 4743)]