19640240

素因数分解:

$2^4\times 5^1\times {\mathrm{383}}^1\times {\mathrm{641}}^1$

素因数の和:1037

約数の個数: 40

約数和(自身を含む): 45854208

約数和(自身を除く): 26213968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 383, 641, 766, 1282, 1532, 1915, 2564, 3064, 3205, 3830, 5128, 6128, 6410, 7660, 10256, 12820, 15320, 25640, 30640, 51280, 245503, 491006, 982012, 1227515, 1964024, 2455030, 3928048, 4910060, 9820120, 19640240]

約数ペア:

[(1, 19640240), (2, 9820120), (4, 4910060), (5, 3928048), (8, 2455030), (10, 1964024), (16, 1227515), (20, 982012), (40, 491006), (80, 245503), (383, 51280), (641, 30640), (766, 25640), (1282, 15320), (1532, 12820), (1915, 10256), (2564, 7660), (3064, 6410), (3205, 6128), (3830, 5128)]