81607660

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:263

約数の個数: 72

約数和(自身を含む): 184343040

約数和(自身を除く): 102735380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 89, 95, 127, 178, 190, 254, 356, 361, 380, 445, 508, 635, 722, 890, 1270, 1444, 1691, 1780, 1805, 2413, 2540, 3382, 3610, 4826, 6764, 7220, 8455, 9652, 11303, 12065, 16910, 22606, 24130, 32129, 33820, 45212, 45847, 48260, 56515, 64258, 91694, 113030, 128516, 160645, 183388, 214757, 226060, 229235, 321290, 429514, 458470, 642580, 859028, 916940, 1073785, 2147570, 4080383, 4295140, 8160766, 16321532, 20401915, 40803830, 81607660]

約数ペア:

[(1, 81607660), (2, 40803830), (4, 20401915), (5, 16321532), (10, 8160766), (19, 4295140), (20, 4080383), (38, 2147570), (76, 1073785), (89, 916940), (95, 859028), (127, 642580), (178, 458470), (190, 429514), (254, 321290), (356, 229235), (361, 226060), (380, 214757), (445, 183388), (508, 160645), (635, 128516), (722, 113030), (890, 91694), (1270, 64258), (1444, 56515), (1691, 48260), (1780, 45847), (1805, 45212), (2413, 33820), (2540, 32129), (3382, 24130), (3610, 22606), (4826, 16910), (6764, 12065), (7220, 11303), (8455, 9652)]