20502560

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9857}}^1$

素因数の和:9885

約数の個数: 48

約数和(自身を含む): 52168536

約数和(自身を除く): 31665976

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9857, 19714, 39428, 49285, 78856, 98570, 128141, 157712, 197140, 256282, 315424, 394280, 512564, 640705, 788560, 1025128, 1281410, 1577120, 2050256, 2562820, 4100512, 5125640, 10251280, 20502560]

約数ペア:

[(1, 20502560), (2, 10251280), (4, 5125640), (5, 4100512), (8, 2562820), (10, 2050256), (13, 1577120), (16, 1281410), (20, 1025128), (26, 788560), (32, 640705), (40, 512564), (52, 394280), (65, 315424), (80, 256282), (104, 197140), (130, 157712), (160, 128141), (208, 98570), (260, 78856), (416, 49285), (520, 39428), (1040, 19714), (2080, 9857)]