21461769

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{691}}^1$

素因数の和:750

約数の個数: 48

約数和(自身を含む): 38862720

約数和(自身を除く): 17400951

約数列:

[1, 3, 7, 9, 17, 21, 29, 51, 63, 87, 119, 153, 203, 261, 357, 493, 609, 691, 1071, 1479, 1827, 2073, 3451, 4437, 4837, 6219, 10353, 11747, 14511, 20039, 31059, 35241, 43533, 60117, 82229, 105723, 140273, 180351, 246687, 340663, 420819, 740061, 1021989, 1262457, 2384641, 3065967, 7153923, 21461769]

約数ペア:

[(1, 21461769), (3, 7153923), (7, 3065967), (9, 2384641), (17, 1262457), (21, 1021989), (29, 740061), (51, 420819), (63, 340663), (87, 246687), (119, 180351), (153, 140273), (203, 105723), (261, 82229), (357, 60117), (493, 43533), (609, 35241), (691, 31059), (1071, 20039), (1479, 14511), (1827, 11747), (2073, 10353), (3451, 6219), (4437, 4837)]