28202020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{18313}}^1$

素因数の和:18340

約数の個数: 48

約数和(自身を含む): 73842048

約数和(自身を除く): 45640028

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 18313, 36626, 73252, 91565, 128191, 183130, 201443, 256382, 366260, 402886, 512764, 640955, 805772, 1007215, 1281910, 1410101, 2014430, 2563820, 2820202, 4028860, 5640404, 7050505, 14101010, 28202020]

約数ペア:

[(1, 28202020), (2, 14101010), (4, 7050505), (5, 5640404), (7, 4028860), (10, 2820202), (11, 2563820), (14, 2014430), (20, 1410101), (22, 1281910), (28, 1007215), (35, 805772), (44, 640955), (55, 512764), (70, 402886), (77, 366260), (110, 256382), (140, 201443), (154, 183130), (220, 128191), (308, 91565), (385, 73252), (770, 36626), (1540, 18313)]