20201480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{733}}^1$

素因数の和:810

約数の個数: 64

約数和(自身を含む): 49941360

約数和(自身を除く): 29739880

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 53, 65, 104, 106, 130, 212, 260, 265, 424, 520, 530, 689, 733, 1060, 1378, 1466, 2120, 2756, 2932, 3445, 3665, 5512, 5864, 6890, 7330, 9529, 13780, 14660, 19058, 27560, 29320, 38116, 38849, 47645, 76232, 77698, 95290, 155396, 190580, 194245, 310792, 381160, 388490, 505037, 776980, 1010074, 1553960, 2020148, 2525185, 4040296, 5050370, 10100740, 20201480]

約数ペア:

[(1, 20201480), (2, 10100740), (4, 5050370), (5, 4040296), (8, 2525185), (10, 2020148), (13, 1553960), (20, 1010074), (26, 776980), (40, 505037), (52, 388490), (53, 381160), (65, 310792), (104, 194245), (106, 190580), (130, 155396), (212, 95290), (260, 77698), (265, 76232), (424, 47645), (520, 38849), (530, 38116), (689, 29320), (733, 27560), (1060, 19058), (1378, 14660), (1466, 13780), (2120, 9529), (2756, 7330), (2932, 6890), (3445, 5864), (3665, 5512)]