20399643

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1$

素因数の和:105

約数の個数: 72

約数和(自身を含む): 36781056

約数和(自身を除く): 16381413

約数列:

[1, 3, 9, 11, 17, 23, 31, 33, 51, 69, 93, 99, 153, 187, 207, 253, 279, 289, 341, 391, 527, 561, 713, 759, 867, 1023, 1173, 1581, 1683, 2139, 2277, 2601, 3069, 3179, 3519, 4301, 4743, 5797, 6417, 6647, 7843, 8959, 9537, 12121, 12903, 17391, 19941, 23529, 26877, 28611, 36363, 38709, 52173, 59823, 70587, 73117, 80631, 98549, 109089, 133331, 206057, 219351, 295647, 399993, 618171, 658053, 886941, 1199979, 1854513, 2266627, 6799881, 20399643]

約数ペア:

[(1, 20399643), (3, 6799881), (9, 2266627), (11, 1854513), (17, 1199979), (23, 886941), (31, 658053), (33, 618171), (51, 399993), (69, 295647), (93, 219351), (99, 206057), (153, 133331), (187, 109089), (207, 98549), (253, 80631), (279, 73117), (289, 70587), (341, 59823), (391, 52173), (527, 38709), (561, 36363), (713, 28611), (759, 26877), (867, 23529), (1023, 19941), (1173, 17391), (1581, 12903), (1683, 12121), (2139, 9537), (2277, 8959), (2601, 7843), (3069, 6647), (3179, 6417), (3519, 5797), (4301, 4743)]