20851927460

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1636729}}^1$

素因数の和:1636765

約数の個数: 72

約数和(自身を含む): 54856642680

約数和(自身を除く): 34004715220

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1820, 2548, 3185, 6370, 12740, 1636729, 3273458, 6546916, 8183645, 11457103, 16367290, 21277477, 22914206, 32734580, 42554954, 45828412, 57285515, 80199721, 85109908, 106387385, 114571030, 148942339, 160399442, 212774770, 229142060, 297884678, 320798884, 400998605, 425549540, 595769356, 744711695, 801997210, 1042596373, 1489423390, 1603994420, 2085192746, 2978846780, 4170385492, 5212981865, 10425963730, 20851927460]

約数ペア:

[(1, 20851927460), (2, 10425963730), (4, 5212981865), (5, 4170385492), (7, 2978846780), (10, 2085192746), (13, 1603994420), (14, 1489423390), (20, 1042596373), (26, 801997210), (28, 744711695), (35, 595769356), (49, 425549540), (52, 400998605), (65, 320798884), (70, 297884678), (91, 229142060), (98, 212774770), (130, 160399442), (140, 148942339), (182, 114571030), (196, 106387385), (245, 85109908), (260, 80199721), (364, 57285515), (455, 45828412), (490, 42554954), (637, 32734580), (910, 22914206), (980, 21277477), (1274, 16367290), (1820, 11457103), (2548, 8183645), (3185, 6546916), (6370, 3273458), (12740, 1636729)]