19952065

素因数分解:

$5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:158

約数の個数: 48

約数和(自身を含む): 29942784

約数和(自身を除く): 9990719

約数列:

[1, 5, 7, 31, 35, 37, 49, 71, 155, 185, 217, 245, 259, 355, 497, 1085, 1147, 1295, 1519, 1813, 2201, 2485, 2627, 3479, 5735, 7595, 8029, 9065, 11005, 13135, 15407, 17395, 18389, 40145, 56203, 77035, 81437, 91945, 107849, 128723, 281015, 407185, 539245, 570059, 643615, 2850295, 3990413, 19952065]

約数ペア:

[(1, 19952065), (5, 3990413), (7, 2850295), (31, 643615), (35, 570059), (37, 539245), (49, 407185), (71, 281015), (155, 128723), (185, 107849), (217, 91945), (245, 81437), (259, 77035), (355, 56203), (497, 40145), (1085, 18389), (1147, 17395), (1295, 15407), (1519, 13135), (1813, 11005), (2201, 9065), (2485, 8029), (2627, 7595), (3479, 5735)]