215880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{257}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 743040

約数和(自身を除く): 527160

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 257, 280, 420, 514, 771, 840, 1028, 1285, 1542, 1799, 2056, 2570, 3084, 3598, 3855, 5140, 5397, 6168, 7196, 7710, 8995, 10280, 10794, 14392, 15420, 17990, 21588, 26985, 30840, 35980, 43176, 53970, 71960, 107940, 215880]

約数ペア:

[(1, 215880), (2, 107940), (3, 71960), (4, 53970), (5, 43176), (6, 35980), (7, 30840), (8, 26985), (10, 21588), (12, 17990), (14, 15420), (15, 14392), (20, 10794), (21, 10280), (24, 8995), (28, 7710), (30, 7196), (35, 6168), (40, 5397), (42, 5140), (56, 3855), (60, 3598), (70, 3084), (84, 2570), (105, 2056), (120, 1799), (140, 1542), (168, 1285), (210, 1028), (257, 840), (280, 771), (420, 514)]