21242684

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{47}}^1\times {\mathrm{313}}^1$

素因数の和:402

約数の個数: 36

約数和(自身を含む): 40197024

約数和(自身を除く): 18954340

約数列:

[1, 2, 4, 19, 38, 47, 76, 94, 188, 313, 361, 626, 722, 893, 1252, 1444, 1786, 3572, 5947, 11894, 14711, 16967, 23788, 29422, 33934, 58844, 67868, 112993, 225986, 279509, 451972, 559018, 1118036, 5310671, 10621342, 21242684]

約数ペア:

[(1, 21242684), (2, 10621342), (4, 5310671), (19, 1118036), (38, 559018), (47, 451972), (76, 279509), (94, 225986), (188, 112993), (313, 67868), (361, 58844), (626, 33934), (722, 29422), (893, 23788), (1252, 16967), (1444, 14711), (1786, 11894), (3572, 5947)]