28864773

素因数分解:

$3^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 52373880

約数和(自身を除く): 23509107

約数列:

[1, 3, 7, 9, 21, 29, 37, 49, 61, 63, 87, 111, 147, 183, 203, 259, 261, 333, 427, 441, 549, 609, 777, 1073, 1281, 1421, 1769, 1813, 1827, 2257, 2331, 2989, 3219, 3843, 4263, 5307, 5439, 6771, 7511, 8967, 9657, 12383, 12789, 15799, 15921, 16317, 20313, 22533, 26901, 37149, 47397, 52577, 65453, 67599, 86681, 110593, 111447, 142191, 157731, 196359, 260043, 331779, 458171, 473193, 589077, 780129, 995337, 1374513, 3207197, 4123539, 9621591, 28864773]

約数ペア:

[(1, 28864773), (3, 9621591), (7, 4123539), (9, 3207197), (21, 1374513), (29, 995337), (37, 780129), (49, 589077), (61, 473193), (63, 458171), (87, 331779), (111, 260043), (147, 196359), (183, 157731), (203, 142191), (259, 111447), (261, 110593), (333, 86681), (427, 67599), (441, 65453), (549, 52577), (609, 47397), (777, 37149), (1073, 26901), (1281, 22533), (1421, 20313), (1769, 16317), (1813, 15921), (1827, 15799), (2257, 12789), (2331, 12383), (2989, 9657), (3219, 8967), (3843, 7511), (4263, 6771), (5307, 5439)]