40978340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{397}}^2$

素因数の和:816

約数の個数: 36

約数和(自身を含む): 92908116

約数和(自身を除く): 51929776

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 397, 794, 1588, 1985, 3970, 5161, 7940, 10322, 20644, 25805, 51610, 103220, 157609, 315218, 630436, 788045, 1576090, 2048917, 3152180, 4097834, 8195668, 10244585, 20489170, 40978340]

約数ペア:

[(1, 40978340), (2, 20489170), (4, 10244585), (5, 8195668), (10, 4097834), (13, 3152180), (20, 2048917), (26, 1576090), (52, 788045), (65, 630436), (130, 315218), (260, 157609), (397, 103220), (794, 51610), (1588, 25805), (1985, 20644), (3970, 10322), (5161, 7940)]