19210120

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7873}}^1$

素因数の和:7945

約数の個数: 32

約数和(自身を含む): 43936920

約数和(自身を除く): 24726800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7873, 15746, 31492, 39365, 62984, 78730, 157460, 314920, 480253, 960506, 1921012, 2401265, 3842024, 4802530, 9605060, 19210120]

約数ペア:

[(1, 19210120), (2, 9605060), (4, 4802530), (5, 3842024), (8, 2401265), (10, 1921012), (20, 960506), (40, 480253), (61, 314920), (122, 157460), (244, 78730), (305, 62984), (488, 39365), (610, 31492), (1220, 15746), (2440, 7873)]