19995128

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{233}}^1\times {\mathrm{631}}^1$

素因数の和:887

約数の個数: 32

約数和(自身を含む): 39929760

約数和(自身を除く): 19934632

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 233, 466, 631, 932, 1262, 1864, 2524, 3961, 5048, 7922, 10727, 15844, 21454, 31688, 42908, 85816, 147023, 294046, 588092, 1176184, 2499391, 4998782, 9997564, 19995128]

約数ペア:

[(1, 19995128), (2, 9997564), (4, 4998782), (8, 2499391), (17, 1176184), (34, 588092), (68, 294046), (136, 147023), (233, 85816), (466, 42908), (631, 31688), (932, 21454), (1262, 15844), (1864, 10727), (2524, 7922), (3961, 5048)]