21587720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1$

素因数の和:235

約数の個数: 128

約数和(自身を含む): 62346240

約数和(自身を除く): 40758520

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 43, 44, 55, 56, 70, 77, 86, 88, 110, 140, 154, 163, 172, 215, 220, 280, 301, 308, 326, 344, 385, 430, 440, 473, 602, 616, 652, 770, 815, 860, 946, 1141, 1204, 1304, 1505, 1540, 1630, 1720, 1793, 1892, 2282, 2365, 2408, 3010, 3080, 3260, 3311, 3586, 3784, 4564, 4730, 5705, 6020, 6520, 6622, 7009, 7172, 8965, 9128, 9460, 11410, 12040, 12551, 13244, 14018, 14344, 16555, 17930, 18920, 22820, 25102, 26488, 28036, 33110, 35045, 35860, 45640, 49063, 50204, 56072, 62755, 66220, 70090, 71720, 77099, 98126, 100408, 125510, 132440, 140180, 154198, 196252, 245315, 251020, 280360, 308396, 385495, 392504, 490630, 502040, 539693, 616792, 770990, 981260, 1079386, 1541980, 1962520, 2158772, 2698465, 3083960, 4317544, 5396930, 10793860, 21587720]

約数ペア:

[(1, 21587720), (2, 10793860), (4, 5396930), (5, 4317544), (7, 3083960), (8, 2698465), (10, 2158772), (11, 1962520), (14, 1541980), (20, 1079386), (22, 981260), (28, 770990), (35, 616792), (40, 539693), (43, 502040), (44, 490630), (55, 392504), (56, 385495), (70, 308396), (77, 280360), (86, 251020), (88, 245315), (110, 196252), (140, 154198), (154, 140180), (163, 132440), (172, 125510), (215, 100408), (220, 98126), (280, 77099), (301, 71720), (308, 70090), (326, 66220), (344, 62755), (385, 56072), (430, 50204), (440, 49063), (473, 45640), (602, 35860), (616, 35045), (652, 33110), (770, 28036), (815, 26488), (860, 25102), (946, 22820), (1141, 18920), (1204, 17930), (1304, 16555), (1505, 14344), (1540, 14018), (1630, 13244), (1720, 12551), (1793, 12040), (1892, 11410), (2282, 9460), (2365, 9128), (2408, 8965), (3010, 7172), (3080, 7009), (3260, 6622), (3311, 6520), (3586, 6020), (3784, 5705), (4564, 4730)]