28206620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{691}}^1$

素因数の和:870

約数の個数: 48

約数和(自身を含む): 64289568

約数和(自身を除く): 36082948

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 157, 260, 314, 628, 691, 785, 1382, 1570, 2041, 2764, 3140, 3455, 4082, 6910, 8164, 8983, 10205, 13820, 17966, 20410, 35932, 40820, 44915, 89830, 108487, 179660, 216974, 433948, 542435, 1084870, 1410331, 2169740, 2820662, 5641324, 7051655, 14103310, 28206620]

約数ペア:

[(1, 28206620), (2, 14103310), (4, 7051655), (5, 5641324), (10, 2820662), (13, 2169740), (20, 1410331), (26, 1084870), (52, 542435), (65, 433948), (130, 216974), (157, 179660), (260, 108487), (314, 89830), (628, 44915), (691, 40820), (785, 35932), (1382, 20410), (1570, 17966), (2041, 13820), (2764, 10205), (3140, 8983), (3455, 8164), (4082, 6910)]