21268821

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{883}}^1$

素因数の和:961

約数の個数: 32

約数和(自身を含む): 34398208

約数和(自身を除く): 13129387

約数列:

[1, 3, 7, 21, 31, 37, 93, 111, 217, 259, 651, 777, 883, 1147, 2649, 3441, 6181, 8029, 18543, 24087, 27373, 32671, 82119, 98013, 191611, 228697, 574833, 686091, 1012801, 3038403, 7089607, 21268821]

約数ペア:

[(1, 21268821), (3, 7089607), (7, 3038403), (21, 1012801), (31, 686091), (37, 574833), (93, 228697), (111, 191611), (217, 98013), (259, 82119), (651, 32671), (777, 27373), (883, 24087), (1147, 18543), (2649, 8029), (3441, 6181)]