1998725680

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{509879}}^1$

素因数の和:509906

約数の個数: 60

約数和(自身を含む): 5405747760

約数和(自身を除く): 3407022080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 509879, 1019758, 2039516, 2549395, 3569153, 4079032, 5098790, 7138306, 8158064, 10197580, 14276612, 17845765, 20395160, 24984071, 28553224, 35691530, 40790320, 49968142, 57106448, 71383060, 99936284, 124920355, 142766120, 199872568, 249840710, 285532240, 399745136, 499681420, 999362840, 1998725680]

約数ペア:

[(1, 1998725680), (2, 999362840), (4, 499681420), (5, 399745136), (7, 285532240), (8, 249840710), (10, 199872568), (14, 142766120), (16, 124920355), (20, 99936284), (28, 71383060), (35, 57106448), (40, 49968142), (49, 40790320), (56, 35691530), (70, 28553224), (80, 24984071), (98, 20395160), (112, 17845765), (140, 14276612), (196, 10197580), (245, 8158064), (280, 7138306), (392, 5098790), (490, 4079032), (560, 3569153), (784, 2549395), (980, 2039516), (1960, 1019758), (3920, 509879)]