21287944

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{997}}^1$

素因数の和:1177

約数の個数: 32

約数和(自身を含む): 42574680

約数和(自身を除く): 21286736

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 157, 314, 628, 997, 1256, 1994, 2669, 3988, 5338, 7976, 10676, 16949, 21352, 33898, 67796, 135592, 156529, 313058, 626116, 1252232, 2660993, 5321986, 10643972, 21287944]

約数ペア:

[(1, 21287944), (2, 10643972), (4, 5321986), (8, 2660993), (17, 1252232), (34, 626116), (68, 313058), (136, 156529), (157, 135592), (314, 67796), (628, 33898), (997, 21352), (1256, 16949), (1994, 10676), (2669, 7976), (3988, 5338)]