19900647

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{18899}}^1$

素因数の和:18924

約数の個数: 20

約数和(自身を含む): 32016600

約数和(自身を除く): 12115953

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 18899, 56697, 170091, 245687, 510273, 737061, 1530819, 2211183, 6633549, 19900647]

約数ペア:

[(1, 19900647), (3, 6633549), (9, 2211183), (13, 1530819), (27, 737061), (39, 510273), (81, 245687), (117, 170091), (351, 56697), (1053, 18899)]