20765619

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{281}}^1$

素因数の和:337

約数の個数: 64

約数和(自身を含む): 38983680

約数和(自身を除く): 18218061

約数列:

[1, 3, 7, 9, 17, 21, 23, 27, 51, 63, 69, 119, 153, 161, 189, 207, 281, 357, 391, 459, 483, 621, 843, 1071, 1173, 1449, 1967, 2529, 2737, 3213, 3519, 4347, 4777, 5901, 6463, 7587, 8211, 10557, 14331, 17703, 19389, 24633, 33439, 42993, 45241, 53109, 58167, 73899, 100317, 109871, 128979, 135723, 174501, 300951, 329613, 407169, 769097, 902853, 988839, 1221507, 2307291, 2966517, 6921873, 20765619]

約数ペア:

[(1, 20765619), (3, 6921873), (7, 2966517), (9, 2307291), (17, 1221507), (21, 988839), (23, 902853), (27, 769097), (51, 407169), (63, 329613), (69, 300951), (119, 174501), (153, 135723), (161, 128979), (189, 109871), (207, 100317), (281, 73899), (357, 58167), (391, 53109), (459, 45241), (483, 42993), (621, 33439), (843, 24633), (1071, 19389), (1173, 17703), (1449, 14331), (1967, 10557), (2529, 8211), (2737, 7587), (3213, 6463), (3519, 5901), (4347, 4777)]