21658833

素因数分解:

$3^5\times 7^2\times {\mathrm{17}}^1\times {\mathrm{107}}^1$

素因数の和:153

約数の個数: 72

約数和(自身を含む): 40334112

約数和(自身を除く): 18675279

約数列:

[1, 3, 7, 9, 17, 21, 27, 49, 51, 63, 81, 107, 119, 147, 153, 189, 243, 321, 357, 441, 459, 567, 749, 833, 963, 1071, 1323, 1377, 1701, 1819, 2247, 2499, 2889, 3213, 3969, 4131, 5243, 5457, 6741, 7497, 8667, 9639, 11907, 12733, 15729, 16371, 20223, 22491, 26001, 28917, 38199, 47187, 49113, 60669, 67473, 89131, 114597, 141561, 147339, 182007, 202419, 267393, 343791, 424683, 442017, 802179, 1031373, 1274049, 2406537, 3094119, 7219611, 21658833]

約数ペア:

[(1, 21658833), (3, 7219611), (7, 3094119), (9, 2406537), (17, 1274049), (21, 1031373), (27, 802179), (49, 442017), (51, 424683), (63, 343791), (81, 267393), (107, 202419), (119, 182007), (147, 147339), (153, 141561), (189, 114597), (243, 89131), (321, 67473), (357, 60669), (441, 49113), (459, 47187), (567, 38199), (749, 28917), (833, 26001), (963, 22491), (1071, 20223), (1323, 16371), (1377, 15729), (1701, 12733), (1819, 11907), (2247, 9639), (2499, 8667), (2889, 7497), (3213, 6741), (3969, 5457), (4131, 5243)]