20990224

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{419}}^1$

素因数の和:559

約数の個数: 40

約数和(自身を含む): 42497280

約数和(自身を除く): 21507056

約数列:

[1, 2, 4, 8, 16, 31, 62, 101, 124, 202, 248, 404, 419, 496, 808, 838, 1616, 1676, 3131, 3352, 6262, 6704, 12524, 12989, 25048, 25978, 42319, 50096, 51956, 84638, 103912, 169276, 207824, 338552, 677104, 1311889, 2623778, 5247556, 10495112, 20990224]

約数ペア:

[(1, 20990224), (2, 10495112), (4, 5247556), (8, 2623778), (16, 1311889), (31, 677104), (62, 338552), (101, 207824), (124, 169276), (202, 103912), (248, 84638), (404, 51956), (419, 50096), (496, 42319), (808, 25978), (838, 25048), (1616, 12989), (1676, 12524), (3131, 6704), (3352, 6262)]