21289653

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{991}}^1$

素因数の和:1046

約数の個数: 48

約数和(自身を含む): 39616512

約数和(自身を除く): 18326859

約数列:

[1, 3, 7, 9, 11, 21, 31, 33, 63, 77, 93, 99, 217, 231, 279, 341, 651, 693, 991, 1023, 1953, 2387, 2973, 3069, 6937, 7161, 8919, 10901, 20811, 21483, 30721, 32703, 62433, 76307, 92163, 98109, 215047, 228921, 276489, 337931, 645141, 686763, 1013793, 1935423, 2365517, 3041379, 7096551, 21289653]

約数ペア:

[(1, 21289653), (3, 7096551), (7, 3041379), (9, 2365517), (11, 1935423), (21, 1013793), (31, 686763), (33, 645141), (63, 337931), (77, 276489), (93, 228921), (99, 215047), (217, 98109), (231, 92163), (279, 76307), (341, 62433), (651, 32703), (693, 30721), (991, 21483), (1023, 20811), (1953, 10901), (2387, 8919), (2973, 7161), (3069, 6937)]