19797995

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 28532736

約数和(自身を除く): 8734741

約数列:

[1, 5, 7, 31, 35, 71, 155, 217, 257, 355, 497, 1085, 1285, 1799, 2201, 2485, 7967, 8995, 11005, 15407, 18247, 39835, 55769, 77035, 91235, 127729, 278845, 565657, 638645, 2828285, 3959599, 19797995]

約数ペア:

[(1, 19797995), (5, 3959599), (7, 2828285), (31, 638645), (35, 565657), (71, 278845), (155, 127729), (217, 91235), (257, 77035), (355, 55769), (497, 39835), (1085, 18247), (1285, 15407), (1799, 11005), (2201, 8995), (2485, 7967)]