19838720

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1409}}^1$

素因数の和:1441

約数の個数: 72

約数和(自身を含む): 51876720

約数和(自身を除く): 32038000

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 640, 704, 880, 1280, 1408, 1409, 1760, 2816, 2818, 3520, 5636, 7040, 7045, 11272, 14080, 14090, 15499, 22544, 28180, 30998, 45088, 56360, 61996, 77495, 90176, 112720, 123992, 154990, 180352, 225440, 247984, 309980, 360704, 450880, 495968, 619960, 901760, 991936, 1239920, 1803520, 1983872, 2479840, 3967744, 4959680, 9919360, 19838720]

約数ペア:

[(1, 19838720), (2, 9919360), (4, 4959680), (5, 3967744), (8, 2479840), (10, 1983872), (11, 1803520), (16, 1239920), (20, 991936), (22, 901760), (32, 619960), (40, 495968), (44, 450880), (55, 360704), (64, 309980), (80, 247984), (88, 225440), (110, 180352), (128, 154990), (160, 123992), (176, 112720), (220, 90176), (256, 77495), (320, 61996), (352, 56360), (440, 45088), (640, 30998), (704, 28180), (880, 22544), (1280, 15499), (1408, 14090), (1409, 14080), (1760, 11272), (2816, 7045), (2818, 7040), (3520, 5636)]