18877915

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{137}}^1$

素因数の和:307

約数の個数: 32

約数和(自身を含む): 27131904

約数和(自身を除く): 8253989

約数列:

[1, 5, 7, 31, 35, 127, 137, 155, 217, 635, 685, 889, 959, 1085, 3937, 4247, 4445, 4795, 17399, 19685, 21235, 27559, 29729, 86995, 121793, 137795, 148645, 539369, 608965, 2696845, 3775583, 18877915]

約数ペア:

[(1, 18877915), (5, 3775583), (7, 2696845), (31, 608965), (35, 539369), (127, 148645), (137, 137795), (155, 121793), (217, 86995), (635, 29729), (685, 27559), (889, 21235), (959, 19685), (1085, 17399), (3937, 4795), (4247, 4445)]