19928545

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6257}}^1$

素因数の和:6289

約数の個数: 24

約数和(自身を含む): 29963304

約数和(自身を除く): 10034759

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6257, 31285, 43799, 81341, 218995, 306593, 406705, 569387, 1532965, 2846935, 3985709, 19928545]

約数ペア:

[(1, 19928545), (5, 3985709), (7, 2846935), (13, 1532965), (35, 569387), (49, 406705), (65, 306593), (91, 218995), (245, 81341), (455, 43799), (637, 31285), (3185, 6257)]