21286914

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{379}}^1$

素因数の和:455

約数の個数: 64

約数和(自身を含む): 49904640

約数和(自身を除く): 28617726

約数列:

[1, 2, 3, 6, 11, 22, 23, 33, 37, 46, 66, 69, 74, 111, 138, 222, 253, 379, 407, 506, 758, 759, 814, 851, 1137, 1221, 1518, 1702, 2274, 2442, 2553, 4169, 5106, 8338, 8717, 9361, 12507, 14023, 17434, 18722, 25014, 26151, 28046, 28083, 42069, 52302, 56166, 84138, 95887, 154253, 191774, 287661, 308506, 322529, 462759, 575322, 645058, 925518, 967587, 1935174, 3547819, 7095638, 10643457, 21286914]

約数ペア:

[(1, 21286914), (2, 10643457), (3, 7095638), (6, 3547819), (11, 1935174), (22, 967587), (23, 925518), (33, 645058), (37, 575322), (46, 462759), (66, 322529), (69, 308506), (74, 287661), (111, 191774), (138, 154253), (222, 95887), (253, 84138), (379, 56166), (407, 52302), (506, 42069), (758, 28083), (759, 28046), (814, 26151), (851, 25014), (1137, 18722), (1221, 17434), (1518, 14023), (1702, 12507), (2274, 9361), (2442, 8717), (2553, 8338), (4169, 5106)]