21978892

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^2\times {\mathrm{47}}^1$

素因数の和:127

約数の個数: 72

約数和(自身を含む): 46823616

約数和(自身を除く): 24844724

約数列:

[1, 2, 4, 13, 17, 23, 26, 34, 46, 47, 52, 68, 92, 94, 188, 221, 299, 391, 442, 529, 598, 611, 782, 799, 884, 1058, 1081, 1196, 1222, 1564, 1598, 2116, 2162, 2444, 3196, 4324, 5083, 6877, 8993, 10166, 10387, 13754, 14053, 17986, 18377, 20332, 20774, 24863, 27508, 28106, 35972, 36754, 41548, 49726, 56212, 73508, 99452, 116909, 233818, 238901, 323219, 422671, 467636, 477802, 646438, 845342, 955604, 1292876, 1690684, 5494723, 10989446, 21978892]

約数ペア:

[(1, 21978892), (2, 10989446), (4, 5494723), (13, 1690684), (17, 1292876), (23, 955604), (26, 845342), (34, 646438), (46, 477802), (47, 467636), (52, 422671), (68, 323219), (92, 238901), (94, 233818), (188, 116909), (221, 99452), (299, 73508), (391, 56212), (442, 49726), (529, 41548), (598, 36754), (611, 35972), (782, 28106), (799, 27508), (884, 24863), (1058, 20774), (1081, 20332), (1196, 18377), (1222, 17986), (1564, 14053), (1598, 13754), (2116, 10387), (2162, 10166), (2444, 8993), (3196, 6877), (4324, 5083)]