78984880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{439}}^1$

素因数の和:638

約数の個数: 80

約数和(自身を含む): 199362240

約数和(自身を除く): 120377360

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 173, 208, 260, 346, 439, 520, 692, 865, 878, 1040, 1384, 1730, 1756, 2195, 2249, 2768, 3460, 3512, 4390, 4498, 5707, 6920, 7024, 8780, 8996, 11245, 11414, 13840, 17560, 17992, 22490, 22828, 28535, 35120, 35984, 44980, 45656, 57070, 75947, 89960, 91312, 114140, 151894, 179920, 228280, 303788, 379735, 456560, 607576, 759470, 987311, 1215152, 1518940, 1974622, 3037880, 3949244, 4936555, 6075760, 7898488, 9873110, 15796976, 19746220, 39492440, 78984880]

約数ペア:

[(1, 78984880), (2, 39492440), (4, 19746220), (5, 15796976), (8, 9873110), (10, 7898488), (13, 6075760), (16, 4936555), (20, 3949244), (26, 3037880), (40, 1974622), (52, 1518940), (65, 1215152), (80, 987311), (104, 759470), (130, 607576), (173, 456560), (208, 379735), (260, 303788), (346, 228280), (439, 179920), (520, 151894), (692, 114140), (865, 91312), (878, 89960), (1040, 75947), (1384, 57070), (1730, 45656), (1756, 44980), (2195, 35984), (2249, 35120), (2768, 28535), (3460, 22828), (3512, 22490), (4390, 17992), (4498, 17560), (5707, 13840), (6920, 11414), (7024, 11245), (8780, 8996)]