81383220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1609}}^1$

素因数の和:1905

約数の個数: 72

約数和(自身を含む): 247894920

約数和(自身を除く): 166511700

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 281, 562, 843, 1124, 1405, 1609, 1686, 2529, 2810, 3218, 3372, 4215, 4827, 5058, 5620, 6436, 8045, 8430, 9654, 10116, 12645, 14481, 16090, 16860, 19308, 24135, 25290, 28962, 32180, 48270, 50580, 57924, 72405, 96540, 144810, 289620, 452129, 904258, 1356387, 1808516, 2260645, 2712774, 4069161, 4521290, 5425548, 6781935, 8138322, 9042580, 13563870, 16276644, 20345805, 27127740, 40691610, 81383220]

約数ペア:

[(1, 81383220), (2, 40691610), (3, 27127740), (4, 20345805), (5, 16276644), (6, 13563870), (9, 9042580), (10, 8138322), (12, 6781935), (15, 5425548), (18, 4521290), (20, 4069161), (30, 2712774), (36, 2260645), (45, 1808516), (60, 1356387), (90, 904258), (180, 452129), (281, 289620), (562, 144810), (843, 96540), (1124, 72405), (1405, 57924), (1609, 50580), (1686, 48270), (2529, 32180), (2810, 28962), (3218, 25290), (3372, 24135), (4215, 19308), (4827, 16860), (5058, 16090), (5620, 14481), (6436, 12645), (8045, 10116), (8430, 9654)]