20641491

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{331}}^1$

素因数の和:404

約数の個数: 36

約数和(自身を含む): 33172776

約数和(自身を除く): 12531285

約数列:

[1, 3, 9, 13, 39, 41, 117, 123, 169, 331, 369, 507, 533, 993, 1521, 1599, 2979, 4303, 4797, 6929, 12909, 13571, 20787, 38727, 40713, 55939, 62361, 122139, 167817, 176423, 503451, 529269, 1587807, 2293499, 6880497, 20641491]

約数ペア:

[(1, 20641491), (3, 6880497), (9, 2293499), (13, 1587807), (39, 529269), (41, 503451), (117, 176423), (123, 167817), (169, 122139), (331, 62361), (369, 55939), (507, 40713), (533, 38727), (993, 20787), (1521, 13571), (1599, 12909), (2979, 6929), (4303, 4797)]