19805877

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2687}}^1$

素因数の和:2719

約数の個数: 40

約数和(自身を含む): 36427776

約数和(自身を除く): 16621899

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 273, 351, 567, 819, 1053, 2457, 2687, 7371, 8061, 18809, 24183, 34931, 56427, 72549, 104793, 169281, 217647, 244517, 314379, 507843, 733551, 943137, 1523529, 2200653, 2829411, 6601959, 19805877]

約数ペア:

[(1, 19805877), (3, 6601959), (7, 2829411), (9, 2200653), (13, 1523529), (21, 943137), (27, 733551), (39, 507843), (63, 314379), (81, 244517), (91, 217647), (117, 169281), (189, 104793), (273, 72549), (351, 56427), (567, 34931), (819, 24183), (1053, 18809), (2457, 8061), (2687, 7371)]