20806448

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1493}}^1$

素因数の和:1581

約数の個数: 40

約数和(自身を含む): 44090928

約数和(自身を除く): 23284480

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1493, 1742, 2986, 3484, 5972, 6968, 11944, 13936, 19409, 23888, 38818, 77636, 100031, 155272, 200062, 310544, 400124, 800248, 1300403, 1600496, 2600806, 5201612, 10403224, 20806448]

約数ペア:

[(1, 20806448), (2, 10403224), (4, 5201612), (8, 2600806), (13, 1600496), (16, 1300403), (26, 800248), (52, 400124), (67, 310544), (104, 200062), (134, 155272), (208, 100031), (268, 77636), (536, 38818), (871, 23888), (1072, 19409), (1493, 13936), (1742, 11944), (2986, 6968), (3484, 5972)]