19780945

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{7507}}^1$

素因数の和:7560

約数の個数: 16

約数和(自身を含む): 25947648

約数和(自身を除く): 6166703

約数列:

[1, 5, 17, 31, 85, 155, 527, 2635, 7507, 37535, 127619, 232717, 638095, 1163585, 3956189, 19780945]

約数ペア:

[(1, 19780945), (5, 3956189), (17, 1163585), (31, 638095), (85, 232717), (155, 127619), (527, 37535), (2635, 7507)]