21498309

素因数分解:

$3^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{41}}^2$

素因数の和:131

約数の個数: 54

約数和(自身を含む): 38302290

約数和(自身を除く): 16803981

約数列:

[1, 3, 7, 9, 21, 29, 41, 49, 63, 87, 123, 147, 203, 261, 287, 369, 441, 609, 861, 1189, 1421, 1681, 1827, 2009, 2583, 3567, 4263, 5043, 6027, 8323, 10701, 11767, 12789, 15129, 18081, 24969, 35301, 48749, 58261, 74907, 82369, 105903, 146247, 174783, 247107, 341243, 438741, 524349, 741321, 1023729, 2388701, 3071187, 7166103, 21498309]

約数ペア:

[(1, 21498309), (3, 7166103), (7, 3071187), (9, 2388701), (21, 1023729), (29, 741321), (41, 524349), (49, 438741), (63, 341243), (87, 247107), (123, 174783), (147, 146247), (203, 105903), (261, 82369), (287, 74907), (369, 58261), (441, 48749), (609, 35301), (861, 24969), (1189, 18081), (1421, 15129), (1681, 12789), (1827, 11767), (2009, 10701), (2583, 8323), (3567, 6027), (4263, 5043)]