20555520

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:178

約数の個数: 144

約数和(自身を含む): 67550112

約数和(自身を除く): 46994592

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 53, 60, 64, 80, 96, 101, 106, 120, 128, 159, 160, 192, 202, 212, 240, 256, 265, 303, 318, 320, 384, 404, 424, 480, 505, 530, 606, 636, 640, 768, 795, 808, 848, 960, 1010, 1060, 1212, 1272, 1280, 1515, 1590, 1616, 1696, 1920, 2020, 2120, 2424, 2544, 3030, 3180, 3232, 3392, 3840, 4040, 4240, 4848, 5088, 5353, 6060, 6360, 6464, 6784, 8080, 8480, 9696, 10176, 10706, 12120, 12720, 12928, 13568, 16059, 16160, 16960, 19392, 20352, 21412, 24240, 25440, 25856, 26765, 32118, 32320, 33920, 38784, 40704, 42824, 48480, 50880, 53530, 64236, 64640, 67840, 77568, 80295, 85648, 96960, 101760, 107060, 128472, 129280, 160590, 171296, 193920, 203520, 214120, 256944, 321180, 342592, 387840, 428240, 513888, 642360, 685184, 856480, 1027776, 1284720, 1370368, 1712960, 2055552, 2569440, 3425920, 4111104, 5138880, 6851840, 10277760, 20555520]

約数ペア:

[(1, 20555520), (2, 10277760), (3, 6851840), (4, 5138880), (5, 4111104), (6, 3425920), (8, 2569440), (10, 2055552), (12, 1712960), (15, 1370368), (16, 1284720), (20, 1027776), (24, 856480), (30, 685184), (32, 642360), (40, 513888), (48, 428240), (53, 387840), (60, 342592), (64, 321180), (80, 256944), (96, 214120), (101, 203520), (106, 193920), (120, 171296), (128, 160590), (159, 129280), (160, 128472), (192, 107060), (202, 101760), (212, 96960), (240, 85648), (256, 80295), (265, 77568), (303, 67840), (318, 64640), (320, 64236), (384, 53530), (404, 50880), (424, 48480), (480, 42824), (505, 40704), (530, 38784), (606, 33920), (636, 32320), (640, 32118), (768, 26765), (795, 25856), (808, 25440), (848, 24240), (960, 21412), (1010, 20352), (1060, 19392), (1212, 16960), (1272, 16160), (1280, 16059), (1515, 13568), (1590, 12928), (1616, 12720), (1696, 12120), (1920, 10706), (2020, 10176), (2120, 9696), (2424, 8480), (2544, 8080), (3030, 6784), (3180, 6464), (3232, 6360), (3392, 6060), (3840, 5353), (4040, 5088), (4240, 4848)]