81236480

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2441}}^1$

素因数の和:2477

約数の個数: 80

約数和(自身を含む): 209845944

約数和(自身を除く): 128609464

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 512, 520, 640, 832, 1040, 1280, 1664, 2080, 2441, 2560, 3328, 4160, 4882, 6656, 8320, 9764, 12205, 16640, 19528, 24410, 31733, 33280, 39056, 48820, 63466, 78112, 97640, 126932, 156224, 158665, 195280, 253864, 312448, 317330, 390560, 507728, 624896, 634660, 781120, 1015456, 1249792, 1269320, 1562240, 2030912, 2538640, 3124480, 4061824, 5077280, 6248960, 8123648, 10154560, 16247296, 20309120, 40618240, 81236480]

約数ペア:

[(1, 81236480), (2, 40618240), (4, 20309120), (5, 16247296), (8, 10154560), (10, 8123648), (13, 6248960), (16, 5077280), (20, 4061824), (26, 3124480), (32, 2538640), (40, 2030912), (52, 1562240), (64, 1269320), (65, 1249792), (80, 1015456), (104, 781120), (128, 634660), (130, 624896), (160, 507728), (208, 390560), (256, 317330), (260, 312448), (320, 253864), (416, 195280), (512, 158665), (520, 156224), (640, 126932), (832, 97640), (1040, 78112), (1280, 63466), (1664, 48820), (2080, 39056), (2441, 33280), (2560, 31733), (3328, 24410), (4160, 19528), (4882, 16640), (6656, 12205), (8320, 9764)]