20115970

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{673}}^1$

素因数の和:755

約数の個数: 48

約数和(自身を含む): 42874488

約数和(自身を除く): 22758518

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 61, 70, 98, 122, 245, 305, 427, 490, 610, 673, 854, 1346, 2135, 2989, 3365, 4270, 4711, 5978, 6730, 9422, 14945, 23555, 29890, 32977, 41053, 47110, 65954, 82106, 164885, 205265, 287371, 329770, 410530, 574742, 1436855, 2011597, 2873710, 4023194, 10057985, 20115970]

約数ペア:

[(1, 20115970), (2, 10057985), (5, 4023194), (7, 2873710), (10, 2011597), (14, 1436855), (35, 574742), (49, 410530), (61, 329770), (70, 287371), (98, 205265), (122, 164885), (245, 82106), (305, 65954), (427, 47110), (490, 41053), (610, 32977), (673, 29890), (854, 23555), (1346, 14945), (2135, 9422), (2989, 6730), (3365, 5978), (4270, 4711)]