81406780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{44729}}^1$

素因数の和:44758

約数の個数: 48

約数和(自身を含む): 210409920

約数和(自身を除く): 129003140

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 44729, 89458, 178916, 223645, 313103, 447290, 581477, 626206, 894580, 1162954, 1252412, 1565515, 2325908, 2907385, 3131030, 4070339, 5814770, 6262060, 8140678, 11629540, 16281356, 20351695, 40703390, 81406780]

約数ペア:

[(1, 81406780), (2, 40703390), (4, 20351695), (5, 16281356), (7, 11629540), (10, 8140678), (13, 6262060), (14, 5814770), (20, 4070339), (26, 3131030), (28, 2907385), (35, 2325908), (52, 1565515), (65, 1252412), (70, 1162954), (91, 894580), (130, 626206), (140, 581477), (182, 447290), (260, 313103), (364, 223645), (455, 178916), (910, 89458), (1820, 44729)]