20161367840

素因数分解:

$2^5\times 5^1\times {\mathrm{281}}^1\times {\mathrm{509}}^1\times {\mathrm{881}}^1$

素因数の和:1686

約数の個数: 96

約数和(自身を含む): 47949012720

約数和(自身を除く): 27787644880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 281, 509, 562, 881, 1018, 1124, 1405, 1762, 2036, 2248, 2545, 2810, 3524, 4072, 4405, 4496, 5090, 5620, 7048, 8144, 8810, 8992, 10180, 11240, 14096, 16288, 17620, 20360, 22480, 28192, 35240, 40720, 44960, 70480, 81440, 140960, 143029, 247561, 286058, 448429, 495122, 572116, 715145, 896858, 990244, 1144232, 1237805, 1430290, 1793716, 1980488, 2242145, 2288464, 2475610, 2860580, 3587432, 3960976, 4484290, 4576928, 4951220, 5721160, 7174864, 7921952, 8968580, 9902440, 11442320, 14349728, 17937160, 19804880, 22884640, 35874320, 39609760, 71748640, 126008549, 252017098, 504034196, 630042745, 1008068392, 1260085490, 2016136784, 2520170980, 4032273568, 5040341960, 10080683920, 20161367840]

約数ペア:

[(1, 20161367840), (2, 10080683920), (4, 5040341960), (5, 4032273568), (8, 2520170980), (10, 2016136784), (16, 1260085490), (20, 1008068392), (32, 630042745), (40, 504034196), (80, 252017098), (160, 126008549), (281, 71748640), (509, 39609760), (562, 35874320), (881, 22884640), (1018, 19804880), (1124, 17937160), (1405, 14349728), (1762, 11442320), (2036, 9902440), (2248, 8968580), (2545, 7921952), (2810, 7174864), (3524, 5721160), (4072, 4951220), (4405, 4576928), (4496, 4484290), (5090, 3960976), (5620, 3587432), (7048, 2860580), (8144, 2475610), (8810, 2288464), (8992, 2242145), (10180, 1980488), (11240, 1793716), (14096, 1430290), (16288, 1237805), (17620, 1144232), (20360, 990244), (22480, 896858), (28192, 715145), (35240, 572116), (40720, 495122), (44960, 448429), (70480, 286058), (81440, 247561), (140960, 143029)]