211556560

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{691}}^1$

素因数の和:836

約数の個数: 80

約数和(自身を含む): 509699520

約数和(自身を除く): 298142960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 89, 172, 178, 215, 344, 356, 430, 445, 688, 691, 712, 860, 890, 1382, 1424, 1720, 1780, 2764, 3440, 3455, 3560, 3827, 5528, 6910, 7120, 7654, 11056, 13820, 15308, 19135, 27640, 29713, 30616, 38270, 55280, 59426, 61232, 61499, 76540, 118852, 122998, 148565, 153080, 237704, 245996, 297130, 306160, 307495, 475408, 491992, 594260, 614990, 983984, 1188520, 1229980, 2377040, 2459960, 2644457, 4919920, 5288914, 10577828, 13222285, 21155656, 26444570, 42311312, 52889140, 105778280, 211556560]

約数ペア:

[(1, 211556560), (2, 105778280), (4, 52889140), (5, 42311312), (8, 26444570), (10, 21155656), (16, 13222285), (20, 10577828), (40, 5288914), (43, 4919920), (80, 2644457), (86, 2459960), (89, 2377040), (172, 1229980), (178, 1188520), (215, 983984), (344, 614990), (356, 594260), (430, 491992), (445, 475408), (688, 307495), (691, 306160), (712, 297130), (860, 245996), (890, 237704), (1382, 153080), (1424, 148565), (1720, 122998), (1780, 118852), (2764, 76540), (3440, 61499), (3455, 61232), (3560, 59426), (3827, 55280), (5528, 38270), (6910, 30616), (7120, 29713), (7654, 27640), (11056, 19135), (13820, 15308)]