20821584

素因数分解:

$2^4\times 3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1999}}^1$

素因数の和:2048

約数の個数: 80

約数和(自身を含む): 63488000

約数和(自身を除く): 42666416

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 31, 42, 48, 56, 62, 84, 93, 112, 124, 168, 186, 217, 248, 336, 372, 434, 496, 651, 744, 868, 1302, 1488, 1736, 1999, 2604, 3472, 3998, 5208, 5997, 7996, 10416, 11994, 13993, 15992, 23988, 27986, 31984, 41979, 47976, 55972, 61969, 83958, 95952, 111944, 123938, 167916, 185907, 223888, 247876, 335832, 371814, 433783, 495752, 671664, 743628, 867566, 991504, 1301349, 1487256, 1735132, 2602698, 2974512, 3470264, 5205396, 6940528, 10410792, 20821584]

約数ペア:

[(1, 20821584), (2, 10410792), (3, 6940528), (4, 5205396), (6, 3470264), (7, 2974512), (8, 2602698), (12, 1735132), (14, 1487256), (16, 1301349), (21, 991504), (24, 867566), (28, 743628), (31, 671664), (42, 495752), (48, 433783), (56, 371814), (62, 335832), (84, 247876), (93, 223888), (112, 185907), (124, 167916), (168, 123938), (186, 111944), (217, 95952), (248, 83958), (336, 61969), (372, 55972), (434, 47976), (496, 41979), (651, 31984), (744, 27986), (868, 23988), (1302, 15992), (1488, 13993), (1736, 11994), (1999, 10416), (2604, 7996), (3472, 5997), (3998, 5208)]