21245679

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{8647}}^1$

素因数の和:8676

約数の個数: 32

約数和(自身を含む): 38743040

約数和(自身を除く): 17497361

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 91, 117, 189, 273, 351, 819, 2457, 8647, 25941, 60529, 77823, 112411, 181587, 233469, 337233, 544761, 786877, 1011699, 1634283, 2360631, 3035097, 7081893, 21245679]

約数ペア:

[(1, 21245679), (3, 7081893), (7, 3035097), (9, 2360631), (13, 1634283), (21, 1011699), (27, 786877), (39, 544761), (63, 337233), (91, 233469), (117, 181587), (189, 112411), (273, 77823), (351, 60529), (819, 25941), (2457, 8647)]