16631680

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1999}}^1$

素因数の和:2031

約数の個数: 64

約数和(自身を含む): 42840000

約数和(自身を除く): 26208320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 1999, 2080, 3998, 4160, 7996, 8320, 9995, 15992, 19990, 25987, 31984, 39980, 51974, 63968, 79960, 103948, 127936, 129935, 159920, 207896, 255872, 259870, 319840, 415792, 519740, 639680, 831584, 1039480, 1279360, 1663168, 2078960, 3326336, 4157920, 8315840, 16631680]

約数ペア:

[(1, 16631680), (2, 8315840), (4, 4157920), (5, 3326336), (8, 2078960), (10, 1663168), (13, 1279360), (16, 1039480), (20, 831584), (26, 639680), (32, 519740), (40, 415792), (52, 319840), (64, 259870), (65, 255872), (80, 207896), (104, 159920), (128, 129935), (130, 127936), (160, 103948), (208, 79960), (260, 63968), (320, 51974), (416, 39980), (520, 31984), (640, 25987), (832, 19990), (1040, 15992), (1664, 9995), (1999, 8320), (2080, 7996), (3998, 4160)]