158640640

素因数分解:

$2^9\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1999}}^1$

素因数の和:2053

約数の個数: 80

約数和(自身を含む): 392832000

約数和(自身を除く): 234191360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 992, 1240, 1280, 1984, 1999, 2480, 2560, 3968, 3998, 4960, 7936, 7996, 9920, 9995, 15872, 15992, 19840, 19990, 31984, 39680, 39980, 61969, 63968, 79360, 79960, 123938, 127936, 159920, 247876, 255872, 309845, 319840, 495752, 511744, 619690, 639680, 991504, 1023488, 1239380, 1279360, 1983008, 2478760, 2558720, 3966016, 4957520, 5117440, 7932032, 9915040, 15864064, 19830080, 31728128, 39660160, 79320320, 158640640]

約数ペア:

[(1, 158640640), (2, 79320320), (4, 39660160), (5, 31728128), (8, 19830080), (10, 15864064), (16, 9915040), (20, 7932032), (31, 5117440), (32, 4957520), (40, 3966016), (62, 2558720), (64, 2478760), (80, 1983008), (124, 1279360), (128, 1239380), (155, 1023488), (160, 991504), (248, 639680), (256, 619690), (310, 511744), (320, 495752), (496, 319840), (512, 309845), (620, 255872), (640, 247876), (992, 159920), (1240, 127936), (1280, 123938), (1984, 79960), (1999, 79360), (2480, 63968), (2560, 61969), (3968, 39980), (3998, 39680), (4960, 31984), (7936, 19990), (7996, 19840), (9920, 15992), (9995, 15872)]