20372456

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:210

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 23173144

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 62, 71, 89, 104, 124, 142, 178, 248, 284, 356, 403, 568, 712, 806, 923, 1157, 1612, 1846, 2201, 2314, 2759, 3224, 3692, 4402, 4628, 5518, 6319, 7384, 8804, 9256, 11036, 12638, 17608, 22072, 25276, 28613, 35867, 50552, 57226, 71734, 82147, 114452, 143468, 164294, 195889, 228904, 286936, 328588, 391778, 657176, 783556, 1567112, 2546557, 5093114, 10186228, 20372456]

約数ペア:

[(1, 20372456), (2, 10186228), (4, 5093114), (8, 2546557), (13, 1567112), (26, 783556), (31, 657176), (52, 391778), (62, 328588), (71, 286936), (89, 228904), (104, 195889), (124, 164294), (142, 143468), (178, 114452), (248, 82147), (284, 71734), (356, 57226), (403, 50552), (568, 35867), (712, 28613), (806, 25276), (923, 22072), (1157, 17608), (1612, 12638), (1846, 11036), (2201, 9256), (2314, 8804), (2759, 7384), (3224, 6319), (3692, 5518), (4402, 4628)]