20698821

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1787}}^1$

素因数の和:1823

約数の個数: 40

約数和(自身を含む): 36346464

約数和(自身を除く): 15647643

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 81, 99, 117, 143, 297, 351, 429, 891, 1053, 1287, 1787, 3861, 5361, 11583, 16083, 19657, 23231, 48249, 58971, 69693, 144747, 176913, 209079, 255541, 530739, 627237, 766623, 1592217, 1881711, 2299869, 6899607, 20698821]

約数ペア:

[(1, 20698821), (3, 6899607), (9, 2299869), (11, 1881711), (13, 1592217), (27, 766623), (33, 627237), (39, 530739), (81, 255541), (99, 209079), (117, 176913), (143, 144747), (297, 69693), (351, 58971), (429, 48249), (891, 23231), (1053, 19657), (1287, 16083), (1787, 11583), (3861, 5361)]