21507088

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{263}}^1\times {\mathrm{269}}^1$

素因数の和:559

約数の個数: 40

約数和(自身を含む): 44193600

約数和(自身を除く): 22686512

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 263, 269, 304, 526, 538, 1052, 1076, 2104, 2152, 4208, 4304, 4997, 5111, 9994, 10222, 19988, 20444, 39976, 40888, 70747, 79952, 81776, 141494, 282988, 565976, 1131952, 1344193, 2688386, 5376772, 10753544, 21507088]

約数ペア:

[(1, 21507088), (2, 10753544), (4, 5376772), (8, 2688386), (16, 1344193), (19, 1131952), (38, 565976), (76, 282988), (152, 141494), (263, 81776), (269, 79952), (304, 70747), (526, 40888), (538, 39976), (1052, 20444), (1076, 19988), (2104, 10222), (2152, 9994), (4208, 5111), (4304, 4997)]