20193901

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^2\times {\mathrm{79}}^1$

素因数の和:205

約数の個数: 24

約数和(自身を含む): 25652480

約数和(自身を除く): 5458579

約数列:

[1, 7, 13, 53, 79, 91, 371, 553, 689, 1027, 2809, 4187, 4823, 7189, 19663, 29309, 36517, 54431, 221911, 255619, 381017, 1553377, 2884843, 20193901]

約数ペア:

[(1, 20193901), (7, 2884843), (13, 1553377), (53, 381017), (79, 255619), (91, 221911), (371, 54431), (553, 36517), (689, 29309), (1027, 19663), (2809, 7189), (4187, 4823)]