20305780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{4013}}^1$

素因数の和:4056

約数の個数: 48

約数和(自身を含む): 48553344

約数和(自身を除く): 28247564

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 55, 92, 110, 115, 220, 230, 253, 460, 506, 1012, 1265, 2530, 4013, 5060, 8026, 16052, 20065, 40130, 44143, 80260, 88286, 92299, 176572, 184598, 220715, 369196, 441430, 461495, 882860, 922990, 1015289, 1845980, 2030578, 4061156, 5076445, 10152890, 20305780]

約数ペア:

[(1, 20305780), (2, 10152890), (4, 5076445), (5, 4061156), (10, 2030578), (11, 1845980), (20, 1015289), (22, 922990), (23, 882860), (44, 461495), (46, 441430), (55, 369196), (92, 220715), (110, 184598), (115, 176572), (220, 92299), (230, 88286), (253, 80260), (460, 44143), (506, 40130), (1012, 20065), (1265, 16052), (2530, 8026), (4013, 5060)]