81766840

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:173

約数の個数: 128

約数和(自身を含む): 205701120

約数和(自身を除く): 123934280

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 31, 40, 46, 47, 61, 62, 92, 94, 115, 122, 124, 155, 184, 188, 230, 235, 244, 248, 305, 310, 376, 460, 470, 488, 610, 620, 713, 920, 940, 1081, 1220, 1240, 1403, 1426, 1457, 1880, 1891, 2162, 2440, 2806, 2852, 2867, 2914, 3565, 3782, 4324, 5405, 5612, 5704, 5734, 5828, 7015, 7130, 7285, 7564, 8648, 9455, 10810, 11224, 11468, 11656, 14030, 14260, 14335, 14570, 15128, 18910, 21620, 22936, 28060, 28520, 28670, 29140, 33511, 37820, 43240, 43493, 56120, 57340, 58280, 65941, 67022, 75640, 86986, 88877, 114680, 131882, 134044, 167555, 173972, 177754, 217465, 263764, 268088, 329705, 335110, 347944, 355508, 434930, 444385, 527528, 659410, 670220, 711016, 869860, 888770, 1318820, 1340440, 1739720, 1777540, 2044171, 2637640, 3555080, 4088342, 8176684, 10220855, 16353368, 20441710, 40883420, 81766840]

約数ペア:

[(1, 81766840), (2, 40883420), (4, 20441710), (5, 16353368), (8, 10220855), (10, 8176684), (20, 4088342), (23, 3555080), (31, 2637640), (40, 2044171), (46, 1777540), (47, 1739720), (61, 1340440), (62, 1318820), (92, 888770), (94, 869860), (115, 711016), (122, 670220), (124, 659410), (155, 527528), (184, 444385), (188, 434930), (230, 355508), (235, 347944), (244, 335110), (248, 329705), (305, 268088), (310, 263764), (376, 217465), (460, 177754), (470, 173972), (488, 167555), (610, 134044), (620, 131882), (713, 114680), (920, 88877), (940, 86986), (1081, 75640), (1220, 67022), (1240, 65941), (1403, 58280), (1426, 57340), (1457, 56120), (1880, 43493), (1891, 43240), (2162, 37820), (2440, 33511), (2806, 29140), (2852, 28670), (2867, 28520), (2914, 28060), (3565, 22936), (3782, 21620), (4324, 18910), (5405, 15128), (5612, 14570), (5704, 14335), (5734, 14260), (5828, 14030), (7015, 11656), (7130, 11468), (7285, 11224), (7564, 10810), (8648, 9455)]