21520912

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:248

約数の個数: 80

約数和(自身を含む): 51425280

約数和(自身を除く): 29904368

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 89, 112, 119, 127, 136, 178, 238, 254, 272, 356, 476, 508, 623, 712, 889, 952, 1016, 1246, 1424, 1513, 1778, 1904, 2032, 2159, 2492, 3026, 3556, 4318, 4984, 6052, 7112, 8636, 9968, 10591, 11303, 12104, 14224, 15113, 17272, 21182, 22606, 24208, 30226, 34544, 42364, 45212, 60452, 79121, 84728, 90424, 120904, 158242, 169456, 180848, 192151, 241808, 316484, 384302, 632968, 768604, 1265936, 1345057, 1537208, 2690114, 3074416, 5380228, 10760456, 21520912]

約数ペア:

[(1, 21520912), (2, 10760456), (4, 5380228), (7, 3074416), (8, 2690114), (14, 1537208), (16, 1345057), (17, 1265936), (28, 768604), (34, 632968), (56, 384302), (68, 316484), (89, 241808), (112, 192151), (119, 180848), (127, 169456), (136, 158242), (178, 120904), (238, 90424), (254, 84728), (272, 79121), (356, 60452), (476, 45212), (508, 42364), (623, 34544), (712, 30226), (889, 24208), (952, 22606), (1016, 21182), (1246, 17272), (1424, 15113), (1513, 14224), (1778, 12104), (1904, 11303), (2032, 10591), (2159, 9968), (2492, 8636), (3026, 7112), (3556, 6052), (4318, 4984)]