21125968

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{769}}^1$

素因数の和:895

約数の個数: 40

約数和(自身を含む): 43825320

約数和(自身を除く): 22699352

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 101, 136, 202, 272, 404, 769, 808, 1538, 1616, 1717, 3076, 3434, 6152, 6868, 12304, 13073, 13736, 26146, 27472, 52292, 77669, 104584, 155338, 209168, 310676, 621352, 1242704, 1320373, 2640746, 5281492, 10562984, 21125968]

約数ペア:

[(1, 21125968), (2, 10562984), (4, 5281492), (8, 2640746), (16, 1320373), (17, 1242704), (34, 621352), (68, 310676), (101, 209168), (136, 155338), (202, 104584), (272, 77669), (404, 52292), (769, 27472), (808, 26146), (1538, 13736), (1616, 13073), (1717, 12304), (3076, 6868), (3434, 6152)]