20154771

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^2\times {\mathrm{631}}^1$

素因数の和:673

約数の個数: 48

約数和(自身を含む): 37009920

約数和(自身を除く): 16855149

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 91, 117, 169, 189, 273, 351, 507, 631, 819, 1183, 1521, 1893, 2457, 3549, 4417, 4563, 5679, 8203, 10647, 13251, 17037, 24609, 31941, 39753, 57421, 73827, 106639, 119259, 172263, 221481, 319917, 516789, 746473, 959751, 1550367, 2239419, 2879253, 6718257, 20154771]

約数ペア:

[(1, 20154771), (3, 6718257), (7, 2879253), (9, 2239419), (13, 1550367), (21, 959751), (27, 746473), (39, 516789), (63, 319917), (91, 221481), (117, 172263), (169, 119259), (189, 106639), (273, 73827), (351, 57421), (507, 39753), (631, 31941), (819, 24609), (1183, 17037), (1521, 13251), (1893, 10647), (2457, 8203), (3549, 5679), (4417, 4563)]