20458204

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{397}}^1\times {\mathrm{991}}^1$

素因数の和:1405

約数の個数: 24

約数和(自身を含む): 38691968

約数和(自身を除く): 18233764

約数列:

[1, 2, 4, 13, 26, 52, 397, 794, 991, 1588, 1982, 3964, 5161, 10322, 12883, 20644, 25766, 51532, 393427, 786854, 1573708, 5114551, 10229102, 20458204]

約数ペア:

[(1, 20458204), (2, 10229102), (4, 5114551), (13, 1573708), (26, 786854), (52, 393427), (397, 51532), (794, 25766), (991, 20644), (1588, 12883), (1982, 10322), (3964, 5161)]