19686860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{281}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 43206912

約数和(自身を除く): 23520052

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 113, 124, 155, 226, 281, 310, 452, 562, 565, 620, 1124, 1130, 1405, 2260, 2810, 3503, 5620, 7006, 8711, 14012, 17422, 17515, 31753, 34844, 35030, 43555, 63506, 70060, 87110, 127012, 158765, 174220, 317530, 635060, 984343, 1968686, 3937372, 4921715, 9843430, 19686860]

約数ペア:

[(1, 19686860), (2, 9843430), (4, 4921715), (5, 3937372), (10, 1968686), (20, 984343), (31, 635060), (62, 317530), (113, 174220), (124, 158765), (155, 127012), (226, 87110), (281, 70060), (310, 63506), (452, 43555), (562, 35030), (565, 34844), (620, 31753), (1124, 17515), (1130, 17422), (1405, 14012), (2260, 8711), (2810, 7006), (3503, 5620)]