81668860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1951}}^1$

素因数の和:2003

約数の個数: 96

約数和(自身を含む): 220372992

約数和(自身を除く): 138704132

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 23, 26, 28, 35, 46, 52, 65, 70, 91, 92, 115, 130, 140, 161, 182, 230, 260, 299, 322, 364, 455, 460, 598, 644, 805, 910, 1196, 1495, 1610, 1820, 1951, 2093, 2990, 3220, 3902, 4186, 5980, 7804, 8372, 9755, 10465, 13657, 19510, 20930, 25363, 27314, 39020, 41860, 44873, 50726, 54628, 68285, 89746, 101452, 126815, 136570, 177541, 179492, 224365, 253630, 273140, 314111, 355082, 448730, 507260, 583349, 628222, 710164, 887705, 897460, 1166698, 1256444, 1570555, 1775410, 2333396, 2916745, 3141110, 3550820, 4083443, 5833490, 6282220, 8166886, 11666980, 16333772, 20417215, 40834430, 81668860]

約数ペア:

[(1, 81668860), (2, 40834430), (4, 20417215), (5, 16333772), (7, 11666980), (10, 8166886), (13, 6282220), (14, 5833490), (20, 4083443), (23, 3550820), (26, 3141110), (28, 2916745), (35, 2333396), (46, 1775410), (52, 1570555), (65, 1256444), (70, 1166698), (91, 897460), (92, 887705), (115, 710164), (130, 628222), (140, 583349), (161, 507260), (182, 448730), (230, 355082), (260, 314111), (299, 273140), (322, 253630), (364, 224365), (455, 179492), (460, 177541), (598, 136570), (644, 126815), (805, 101452), (910, 89746), (1196, 68285), (1495, 54628), (1610, 50726), (1820, 44873), (1951, 41860), (2093, 39020), (2990, 27314), (3220, 25363), (3902, 20930), (4186, 19510), (5980, 13657), (7804, 10465), (8372, 9755)]