21381569478

素因数分解:

$2^1\times 3^2\times {\mathrm{19}}^1\times {\mathrm{449}}^1\times {\mathrm{139241}}^1$

素因数の和:139717

約数の個数: 48

約数和(自身を含む): 48873942000

約数和(自身を除く): 27492372522

約数列:

[1, 2, 3, 6, 9, 18, 19, 38, 57, 114, 171, 342, 449, 898, 1347, 2694, 4041, 8082, 8531, 17062, 25593, 51186, 76779, 139241, 153558, 278482, 417723, 835446, 1253169, 2506338, 2645579, 5291158, 7936737, 15873474, 23810211, 47620422, 62519209, 125038418, 187557627, 375115254, 562672881, 1125345762, 1187864971, 2375729942, 3563594913, 7127189826, 10690784739, 21381569478]

約数ペア:

[(1, 21381569478), (2, 10690784739), (3, 7127189826), (6, 3563594913), (9, 2375729942), (18, 1187864971), (19, 1125345762), (38, 562672881), (57, 375115254), (114, 187557627), (171, 125038418), (342, 62519209), (449, 47620422), (898, 23810211), (1347, 15873474), (2694, 7936737), (4041, 5291158), (8082, 2645579), (8531, 2506338), (17062, 1253169), (25593, 835446), (51186, 417723), (76779, 278482), (139241, 153558)]