21155120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{1021}}^1$

素因数の和:1078

約数の個数: 80

約数和(自身を含む): 57787968

約数和(自身を除く): 36632848

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 56, 70, 74, 80, 112, 140, 148, 185, 259, 280, 296, 370, 518, 560, 592, 740, 1021, 1036, 1295, 1480, 2042, 2072, 2590, 2960, 4084, 4144, 5105, 5180, 7147, 8168, 10210, 10360, 14294, 16336, 20420, 20720, 28588, 35735, 37777, 40840, 57176, 71470, 75554, 81680, 114352, 142940, 151108, 188885, 264439, 285880, 302216, 377770, 528878, 571760, 604432, 755540, 1057756, 1322195, 1511080, 2115512, 2644390, 3022160, 4231024, 5288780, 10577560, 21155120]

約数ペア:

[(1, 21155120), (2, 10577560), (4, 5288780), (5, 4231024), (7, 3022160), (8, 2644390), (10, 2115512), (14, 1511080), (16, 1322195), (20, 1057756), (28, 755540), (35, 604432), (37, 571760), (40, 528878), (56, 377770), (70, 302216), (74, 285880), (80, 264439), (112, 188885), (140, 151108), (148, 142940), (185, 114352), (259, 81680), (280, 75554), (296, 71470), (370, 57176), (518, 40840), (560, 37777), (592, 35735), (740, 28588), (1021, 20720), (1036, 20420), (1295, 16336), (1480, 14294), (2042, 10360), (2072, 10210), (2590, 8168), (2960, 7147), (4084, 5180), (4144, 5105)]