20828844

素因数分解:

$2^2\times 3^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{281}}^1$

素因数の和:391

約数の個数: 72

約数和(自身を含む): 55429920

約数和(自身を除く): 34601076

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 29, 36, 58, 71, 87, 116, 142, 174, 213, 261, 281, 284, 348, 426, 522, 562, 639, 843, 852, 1044, 1124, 1278, 1686, 2059, 2529, 2556, 3372, 4118, 5058, 6177, 8149, 8236, 10116, 12354, 16298, 18531, 19951, 24447, 24708, 32596, 37062, 39902, 48894, 59853, 73341, 74124, 79804, 97788, 119706, 146682, 179559, 239412, 293364, 359118, 578579, 718236, 1157158, 1735737, 2314316, 3471474, 5207211, 6942948, 10414422, 20828844]

約数ペア:

[(1, 20828844), (2, 10414422), (3, 6942948), (4, 5207211), (6, 3471474), (9, 2314316), (12, 1735737), (18, 1157158), (29, 718236), (36, 578579), (58, 359118), (71, 293364), (87, 239412), (116, 179559), (142, 146682), (174, 119706), (213, 97788), (261, 79804), (281, 74124), (284, 73341), (348, 59853), (426, 48894), (522, 39902), (562, 37062), (639, 32596), (843, 24708), (852, 24447), (1044, 19951), (1124, 18531), (1278, 16298), (1686, 12354), (2059, 10116), (2529, 8236), (2556, 8149), (3372, 6177), (4118, 5058)]