19954545

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3301}}^1$

素因数の和:3353

約数の個数: 32

約数和(自身を含む): 35503104

約数和(自身を除く): 15548559

約数列:

[1, 3, 5, 13, 15, 31, 39, 65, 93, 155, 195, 403, 465, 1209, 2015, 3301, 6045, 9903, 16505, 42913, 49515, 102331, 128739, 214565, 306993, 511655, 643695, 1330303, 1534965, 3990909, 6651515, 19954545]

約数ペア:

[(1, 19954545), (3, 6651515), (5, 3990909), (13, 1534965), (15, 1330303), (31, 643695), (39, 511655), (65, 306993), (93, 214565), (155, 128739), (195, 102331), (403, 49515), (465, 42913), (1209, 16505), (2015, 9903), (3301, 6045)]