21384028

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{2003}}^1$

素因数の和:2181

約数の個数: 24

約数和(自身を含む): 39895632

約数和(自身を除く): 18511604

約数列:

[1, 2, 4, 17, 34, 68, 157, 314, 628, 2003, 2669, 4006, 5338, 8012, 10676, 34051, 68102, 136204, 314471, 628942, 1257884, 5346007, 10692014, 21384028]

約数ペア:

[(1, 21384028), (2, 10692014), (4, 5346007), (17, 1257884), (34, 628942), (68, 314471), (157, 136204), (314, 68102), (628, 34051), (2003, 10676), (2669, 8012), (4006, 5338)]