19485921

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{521}}^1$

素因数の和:681

約数の個数: 32

約数和(自身を含む): 32272128

約数和(自身を除く): 12786207

約数列:

[1, 3, 7, 13, 21, 39, 91, 137, 273, 411, 521, 959, 1563, 1781, 2877, 3647, 5343, 6773, 10941, 12467, 20319, 37401, 47411, 71377, 142233, 214131, 499639, 927901, 1498917, 2783703, 6495307, 19485921]

約数ペア:

[(1, 19485921), (3, 6495307), (7, 2783703), (13, 1498917), (21, 927901), (39, 499639), (91, 214131), (137, 142233), (273, 71377), (411, 47411), (521, 37401), (959, 20319), (1563, 12467), (1781, 10941), (2877, 6773), (3647, 5343)]